1 . Wouldn’t it be great if you could correct your eyesight, especially nearsightedness, and reduce your dependence on glasses and needn’t have eye surgery? The solution is called orthokeratology, or ortho-k (角膜塑形镜).
What is ortho-k?
Orthokeratology( ortho- k)is the fitting of specially designed contact lenses (隐形眼镜) that you wear overnight while you are asleep, the lenses gently reshape the front surface of your cornea (角膜) so you can see clearly the following day after you remove the lenses when you wake up.
How long does the ortho-k effect last?
You should be able to see acceptably well without glasses or contact lenses for a day or two, sometimes longer. For best results, one should wear the ortho- k lenses every might.
Who are good candidates for ortho-k?
Most people with mild to average nearsightedness are good candidates for ortho-k. Because the cornmeal reshaping effect is temporary, little risk is involved, and you can discontinue wearing the lenses at any time. Children and young adults who want to be gases-free but are too young for eye surgery or are afraid of taking the surgery often are good candidates for ortho-k. People who participate in contact sports or work in dusty environments that can have problems for contact lens wear also can be good candidates.
How much does ortho-k cost?
Costs also can vary based on the region of the country and the type of practice where you have the procedure performed. Ortho-k prices in the US generally range from $1, 000 to $2, 000 But particularly difficult cases of ortho-k can cost as much as $4.000.
There are additional costs for lens care solutions and following up exams, which can total about $300 to $ 500 per year.
Finally, keep in mind that, as with all contact lenses, there are some possible side effects of wearing ortho-k lenses. Ask your eye doctor for details.
1. According to the passage, which way is introduced to correct eyesight?| A．Performing an operation of the cornea. |
| B．Applying contact lenses in the daytime. |
| C．Fitting proper glasses during the night. |
| D．Wearing especially designed contact lenses. |
| A．You have to wear ortho-k day and night to ensure good results. |
| B．Ortho-k is a good choice for a man with average nearsightedness. |
| C．The cast of ortho-k in the city is higher than that in the countryside. |
| D．There is no need for people to worry about the side effects of ortho-k. |
| A．1, 000. | B．$1, 300. | C．$1, 500. | D．$2, 000. |
2 . A study by Harvard researchers found that mind wandering, or daydreaming, consumes an average of 47% of peoples’ waking hours. This brings about the question：If mind wandering is so costly to our well-being, then why in the world are we so willing to spend nearly half of our lives in this mental state?
Creative thinkers know, despite what their parents, teachers and school leaders might have told them, that daydreaming is hardly a waste of time. But unfortunately, many students learn to suppress their natural instincts to dream and imagine-instead, they’re taught to fit into a standardized model and to learn by the book, in a way that may not feel natural and that very well may suppress their natural desire to create. But as two famous psychologists recently noted, “Not all minds who wander are lost”-in fact, the mind’s wandering is vital to imagination and creative thought.
Nearly 50 years ago, psychologist Jerome L. Singer established that daydreaming is a normal and indeed widespread aspect of human experience. He found that many people are “happy daydreamers” who enjoy their inner imagery and fantasy. According to Singer, these daydreamers “simply value and enjoy their private experiences, are willing to risk wasting a certain amount of time on them, but also can apparently use them for effective planning and for self-amusement during periods of routine task activity or boredom.”
Singer coined the term positive-constructive daydreaming to describe this type of mind wandering, which he distinguished from poor attention and anxious, obsessive fantasies. By making these important distinctions, Singer was able to highlight the positive, adaptive role that daydreaming can play in our daily lives, under the right circumstances.
1. Who are aware that daydreaming is not a waste of time?| A．Teachers. | B．Parents. | C．School leaders. | D．Creative thinkers. |
| A．learning by the book | B．imagination and creation |
| C．suppression of inner desires | D．instincts and amusements |
| A．Private experience. | B．Circumstances. | C．Fantasies. | D．Happy dreamers. |
| A．It is a useful mental state. | B．It is similar to poor attention. |
| C．It is an anxious. obsessive fantasy. | D．It is a standardized model. |
3 . Children's average daily time spent watching television or using mobile device increased from 53 minutes at 12 months old to more than 150 minutes at 3 years old, according to an analysis by researchers at the National Institutes of Health. Children aged 7 were more likely to spend the highest amount of screen time if they had been in bad home-based childcare or were born to first-time mothers.
“Our results indicate that screen habits begin early,” said Edwina Yeung, an investigator in National Institute of Child Health and Human Development (NICHD), “This finding suggests that interventions to reduce screen time could have a better chance of success if introduced early.”
In the research, mothers of 4,000 children responded to questions on their kids' media habits when they were 12, 18, 24, 30, and 36 months of age.
The American Academy of Pediatrics recommends avoiding digital media exposure for children under 18 months of age, introducing children 18 to 24 months of age to screen media slowly, and limiting screen time to an hour a day for children from 2 to 5 years of age. In the current study, researchers found that 87% of the children had screen time exceeding these recommendations. However, while screen time increased throughout infancy, after 8 years of age, screen time fell to under 1. 5 hours per day. The researchers believe this decrease relates to time consumed by school-related activities.
The study authors classified the children into two groups based on how much their aver- age daily screen time increased from age 1 to age 3. The first group, 73% of the total, had the lower increase, from an average of nearly 51 minutes a day to nearly an hour and 47 minutes a day. The second group, 27% of the total, had the higher increase, from nearly 37 minutes of screen time a day to about 4 hours a day. Higher levels of parental education were associated with the lower odds of inclusion in the second group.
1. Which of the following is a reason for children's addiction to the media?| A．Low economic level. | B．Poor family education |
| C．The media's attraction. | D．The shortage of parents' love. |
| A．To stop children using the media. | B．To help parents care for children well |
| C．To reduce children's screen time earlier | D．To increase intervention to children |
| A．By giving some examples. | B．By showing some data. |
| C．By analyzing some reasons. | D．By concluding some results. |
| A．Probability. | B．Price. | C．Cost. | D．Income. |
4 . When he was two years old, Ben stopped seeing out of his left eye. His mother took him to the doctor and soon discovered he had cancer in both eyes. After possible treatments failed, doctors removed both his eyes. For Ben, vision was gone forever.
But by the time he was seven years old, he had developed a technique for feeling the world around him: he clicked with his mouth and listened for the returning echoes. This method enabled Ben to determine the locations of open doorways, people, parked cars, garbage cans, and so on. He was echolocating: bouncing his sound waves off objects in the environment and catching the reflections to build a mental model of his surroundings.
Echolocation may sound like an improbable feat for a human, but thousands of blind people have perfected this skill, just like Ben did. The event has been written about since at least the 1940s, when the word ''echolocation" was first invented in a science article titled “Echolocation by Blind Men , Bats, and Radar.”
How could blindness give rise to the amazing ability to understand the surroundings with one's ears? The answer lies in a gift on the brain; huge adaptability.
Mother Nature filled our brains with flexibility to adapt to circumstances. Just as sharp teeth and fast legs are useful for survival, so is the brain's ability to reset, which allows for learning, memory, and die ability to develop new skills.
In Ben's case, his brain's flexible wiring repurposed his visual cortex for processing sound. As a result, Ben had more neurons available to deal with listening information, and this increased processing power allowed Ben to interpret soundwaves in shocking detail. Ben's super-hearing proves a more general rule: the more brain area a particular sense has, the better it performs.
1. How did Ben “see” after he had his eyes removed?| A．By using a walking stick. | B．By asking others for help. |
| C．By inventing a new system. | D．By echolocating surroundings. |
| A．Skill. | B．Task. | C．Sense. | D．Invention. |
| A．He laughs best who laughs last. | B．Actions speak louder than words. |
| C．God shuts one door but he opens another. | D．Man becomes learned by asking questions. |
| A．Culture Shock. | B．Human Biology. |
| C．Scientific Technology. | D．Environmental Protection. |
5 . Online Bachelor's Degrees and Programs
The overview
Colleges offer online degrees in a range of fields. Click on a degree program to explore what courses you take, how long the program takes to complete, career options and average salary. For example, to earn an online health science bachelor's degree, you would take courses in public health, health communications and epidemiology(流行病学).
The benefits
Pursuing an accredited(官方认可的)online bachelor's degree can help you take the next step in your career. Through your program, you'll attend online lectures, study from home manage a busy schedule and interact virtually with professors and classmates.
The applicants
An online college degree may appeal to those who want more flexibility in completing their education, or who want to take classes while working full time or parenting. Choosing where to register online will likely be challenging, but below you'll find tools, advice and other resources to make your search easier.
Best online bachelor's programs
U. S. News evaluated several factors to rank the best online bachelor's degree programs, including graduation rates and support services available remotely.
| School name | Tuition per credit | Application deadline | Financial aid available |
| University of Georgia | $ 326 | May 1 | Yes |
| Georgia Washington University | $ 615 | June 10 | No |
| University of Arizona | $ 525 | July 12 | Yes |
| North Carolina University | $ 900 | February 15 | Yes |
To see the full ranking list, please click here.
1. What will you do after attending online degree programs?| A．Get a degree for free. | B．Attend lectures in a hall. |
| C．Take some related courses | D．Talk with teachers face to face. |
| A．Georgia Washington University. | B．University of Georgia. |
| C．North Carolina University. | D．University of Arizona. |
| A．On the Internet. | B．In a magazine. |
| C．In a textbook. | D．In a newspaper. |
6 . Every day, art comes alive in the Metropolitan Museum of Art and through its exhibitions and events, revealing new ideas and unexpected connections across time and across cultures.
Making The Met 1870-2020
The signature exhibition of The Met’s 150th-annivei-sary year takes visitors on a fascinating journey through the history of one of the world’s top cultural institutions. Rarely seen valuable records, photographs, and stories of both behind-the-scenes work and the Museum’s community outreach enhance this unique experience.
The New British Galleries
The British Galleries exhibit almost seven hundred works of art, including a large number of new acquisitions. particularly objects made in the, nineteenth century that were purchased with this project in mind.
About Time: Fashion And Duration
The Costume Institute’s 2020 exhibition tracks a century and a half of fashion—from 1870 to the present - along a troubled timeline, on the occasion of The Met’s 150th anniversary. Employing Henri Bergson’s concept of la durée (duration), it explores how clothes generate time-related associations that mix past, present, and future.
Art of Native America: The Charles and Valeric Diker Collection
This splendid exhibition in the Museum’s American Wing shows 116 masterworks, ranging in date from the second to the early twentieth century, the diverse works are promised gifts, donations and loans to The Met from the pioneering collectors Charles and Valerie Diker.
1. what makes the exhibition Making The Met 1870-2020 unique?| A．Travelling around the world. |
| B．Some valuable records, photographs and stories. |
| C．Photography skills. |
| D．Diverse masterworks. |
| A．The New British Galleries. | B．Art of Native America. |
| C．About Time: Fashion And Duration. | D．Making The Met 1870-2020. |
| A．A statue made in 106. | B．A vase made in 318BC. |
| C．A teapot made in 2020. | D．A violin made in 1999. |
7 . 
TRAVEL ADVISORY
Here are a few things you should know before you take off on your next trip.
Frontier Airlines Face Covering Requirement
As required by federal law, the Centers for Disease Control (CDC) Order and Transportation Security Administration (TSA) Security Directive, all passengers and employees must wear a face covering over nose and mouth throughout the Frontier travel experience including at ticket counters, gate areas, baggage claim and onboard all flights. Face coverings are not required for children under the age of 2. Face coverings must fit snugly(紧密地) over your nose and mouth and be secured under the chin. Not wearing an approved face covering is a violation of federal law and you may lose future travel privileges on Frontier.
* Persons with a disability who cannot wear a mask, or cannot safely wear a mask, because of that disability as defined by the Americans with Disabilities Act can apply for a face mask exemption(豁免). To learn about pre-travel exemption requirements, click here.
Temperature Screening Requirement
Anyone with a temperature of 100.4 degrees Fahrenheit or higher will not be able to board the plane. If time allows, we will give customers the opportunity to rest before receiving a second check. If the second temperature screening is 100.4 degrees or higher, our team will help the customer to rebook travel on a later date when they are feeling better.
Know Your Travel Policy
CDC issued an Order on January 12, 2021(effective since January, 26, 2021) requiring proof of a negative COVID-19 test or documentation of having recovered from COVID-19 for all air passengers arriving from a foreign country to the US.
1. Who can legally board a Frontier Airlines flight without wearing a face covering?| A．A senior manager of Frontier Airlines. | B．A blind man in a wheelchair. |
| C．A one-year-old baby. | D．A high school student. |
| A．Passengers without proper face coverings may be banned from flying with Frontier Airlines in the future. |
| B．Passengers can take off their face coverings when they pick up their checked baggage. |
| C．Passengers with a high fever will have their flights rescheduled. |
| D．Passengers without proof of a negative COVID-19 test can’t enter the US on January 20, 2021. |
| A．A website. | B．A brochure. |
| C．A guidebook. | D．A newspaper. |
