Do you play with your phone before bedtime? You may want to read a book instead. According to a US study, looking at screens at night can cause us to sleep badly.
In the evening, our bodies make melatonin(褪黑素). Melatonin helps us feel sleepy and relaxed. It’s an important part of our sleep cycle(周期). Our electronic screens stop that cycle from working normally(正常地).
Why? Phones, computers and TVs make blue light. Blue light stops our bodies from making melatonin. Even just a little bit of blue light can have an effect(影响). Eight minutes of blue light can keep your brain “awake” for another hour, according to the study. Even if you fall asleep, you may have lots of dreams. Your brain won’t have a good rest.
It’s even worse if you play an exciting game before bedtime. Games make our hearts beat faster, so we have a harder time falling asleep. Then, when we fall asleep, we don’t get enough “deep sleep”.
Use these tips to get a good night’s sleep
*Have a relaxing time every night. Take a warm shower or read a book.
*Sleep in a dark, quiet room that is not too warm or too cold.
*Count sheep. It’s the oldest trick, and it can actually work!
*Don’t eat a big meal or drink coffee. Instead, drink milk.
*Don’t run or exercise three hours before bedtime.
根据语篇内容,选择最佳选项。
41. What can we learn about melatonin?
A.It helps us fall asleep at night. |
B.It makes us feel hungry and tired. |
C.Too much of it makes us sleep badly. |
42. How do phones and computers make it hard for us to sleep?
A.They cannot make us feel relaxed. |
B.Their blue light breaks our sleep cycle. |
C.They can help us to make more dreams. |
43. Which of the following can replace(替换) “awake” in Paragraph 3?
A.dreaming a lot | B.being sleepless | C.having a rest |
44. What should you do before bedtime if you want to get a good night’s sleep?
A.Drinking coffee with milk. |
B.Running from 7 p. m. to 10 p. m. |
C.Keeping your bedroom dark. |
45. What is the best title of the passage?
A.How to Get a Good Sleep |
B.Why Scientists Need to Study Sleep |
C.What Kind of Dreams Most People Have |