Seeing Blue

Blue-light-blocking glasses are supposed protect eyes from blue light from our smartphones and computer screens.     1     we spend much time on them, it sounds smart to buy a pair of blue-light-blocking glasses, right? After all, eye problems     2     lead to poor sleep and even worse diseases. The glasses cost     3     $15 to several hundred dollars. But do they work?

Elizabeth Esparaz, an ophthalmologist (眼科专家), says the reasons which glass companies     4     (share) can be confusing. In fact, blue light is not always bad. “The sun gives off more blue light than smart phones or computers, and it’s actually beneficial,” says Dr. Esparaz.     5     helps our mood and sleep-wake cycle.

The problem is blue light at night: It can harmfully change our work-and-rest cycle and stop us from falling asleep.

So, wearing blue-light-blocking glasses should help people     6     watch movies in bed or read from a tablet at night to avoid sleeplessness. A 2021 review study, in     7     24 past studies were looked at, found that people     8     (affect) by sleep disorders, jet lag and night work fell asleep faster after using these glasses.

As for eye problems, a 2018 review study by in Australia found few evidence that blue-light-blocking glasses prevent eye-related diseases.

“These glasses aren’t going to be harmful,” says Dr. Esparaz. But, she adds, there’s no way to know if one pair is better than another. A     9     (reliable) solution: Turn on the blue-light-filtering (过滤) function on your devices and limit screen time before bed. To help with eye problems, Dr. Esparaz suggests     10     (take) breaks and using relaxing eye drops.

It’s becoming clear that nature nurtures (培养) your body, mind and soul.

In 2003, researchers at the University of Essex invented the term “Green Exercise”,     1    (recognize) the remarkable impact of nature-based activities on health and wellbeing.

“In an analysis of the entire population of England, it was found that the odds of hospitalization (住院几率) for heart disease and stroke are lower among adults     2    live in neighborhoods with highly variable greenness. Improved mental health, reduced obesity and risk of diabetes are other benefits of residential greenness,”     3     (describe) in the World Health Organization’s report.

For those confined to a bed, a window can do wonders for your wellbeing: a study in 1984 revealed that hospital    4    (stay) for some surgical patients were shorter, and fewer painkillers were prescribed (开药方), when the window view was onto a natural scene rather than a brick wall.

“    5    exercise were a pill, it would be one of the most cost-effective drugs ever invented,” says Dr Nick Cavill, a health promotion consultant. Aside from its ability    6    (reduce) your risk of major illnesses, exercise also extends to benefits to the mind,     7     (improve) mental health and wellbeing.

Safe, accessible green spaces make exercise    8     (attractive). “Simply being” quiet and calm among the trees can also boost health and wellbeing, in a practice known as forest bathing.     9     (fascinate) by nature is a balm (让人放松的事物) for the brain, relieving stress. Let’s return to the lost art of being still.

Whether picnicking or park running, being with people brings its own set of benefits. Studies show it is loneliness     10    is as harmful to health as obesity, smoking and high blood pressure; friends enrich your life and enhance your health, through support, stress relief, and sharing of healthy habits.

Before the 1980s, it was quite common for people to follow in their parents’ footsteps by working in the family business     1     at least in the same field. At that time, there was a strong possibility that most people did the same job from     2    (graduate) until retirement.

But up to now great changes     3    (take) place. The truth is that     4    (plan) to work in the same field for entire working life just isn’t     5    (practice) anymore. One reason for this is     6     the skills you have now are likely to be out of date very soon. So if you want to have a chance     7    (build) your own career, you’d better become     8     expert or a specialist in your field; if you want to succeed in a 21^st century career, you will have no choice but to learn to be prepared for those     9    (change). In a word, you are the boss of your career, and you are the one to decide what you can do and how    10    (good) you can do it.

Why is swimming    1     (benefit)to you? One of the key    2    (reason) is that it’s a total-body workout and builds your muscle all over. Each stroke(划水动作)works out a different set of muscles,    3    no matter which stroke you’re using, the act of pulling your body through the water almost    4    (use) all your muscle groups. Swimming is also a workout for your heart system,    5    (raise) your heart rate without placing extra stress on your body.

While running can have a negative effect on your bones and joints, swimming is    6       (complete) safe, which gives you the opportunity to work out    7    stressing your joints. It’s true that the low-impact nature of swimming makes it much less likely     8     (cause) injuries.

According to a study conducted by New York University, swimming can cut men’s risk of dying by almost 50%, a rate which is significantly    9    (high) than running or walking. The study was undertaken over a period of 32 years, and    10    it was only conducted on men, there’s no real reason why the effects should be any different for women.

As the proverb goes, “no one knows the value of health until he loses it.” From this, we know that health is    1     (true) important to everybody. But how to keep fit? Many people believe that sports can offer people health and pleasure. As far as I am concerned, I think doing physical exercise    2    (have) lots of advantages.

First of all, doing exercise in the morning will refresh my body as well as give me     3     good appetite (胃口) to eat my breakfast. What' s more, the air in the morning is really fresh and clean, so l can keep my mind clear and sound in the class. By doing physical exercise every day I can keep my mind sharp,     4     helps me finish my tasks in time.     5     l do not do any physical exercise for a long time, I will feel tired and my body becomes quite sluggish (浑身乏力). During the night, I may find     6     harder to fall asleep. Last but not least, doing exercise every day will help me to build a better personality. It takes time and patience    7     (do) exercise. Sometimes I just want to give     8    , but my friends encourage me to carry on. Then I feel a lot of satisfaction. Doing physical exercise makes me stronger and     9     (health). That’s my personal experience.

As a student, sports are necessary. You can pick up your favorite sport and do it every day. Only in this way can you build up your     10     (strong) and stay happy.