Many people have the habit of looking at their phones before bed or keeping a small night light on because they are afraid of the dark. However, these common behaviors are actually bad for our health. Light at night can harm our sleep, blood sugar, heart and blood vessels.
Studies show that sleeping with light on can raise the risk of heart diseases and diabetes. It may also make people easier to get fat. Light at night stops the body from producing melatonin, which helps us sleep well. It also breaks our body clock and makes blood sugar and blood pressure abnormal. Even weak light from phones or chargers can bring health problems.
Three groups of people should be more careful: people with high blood pressure, high blood sugar or high fat, the old and people who often have trouble sleeping.
To keep healthy, we can do some easy things. First, use thick curtains or an eye mask to make the bedroom dark. Second, stop using phones, TVs and other electronic devices before sleeping. Third, cover the small lights on machines with tape. Fourth, use a soft low-watt night light if you have to get up at night.
Keeping our bedroom completely dark at night is a simple and useful way to protect our health.
阅读理解
1. What bad habits are talked about in the passage?
A. Eating too much before bed and staying up late
B. Looking at phones before bed and keeping lights on at night
C. Sleeping with windows open and drinking coffee before bed
D. Doing sports before bed and sleeping too late
2. According to the passage, what will light at night cause?
A. Better sleep quality
B. Normal blood pressure
C. Higher risk of heart diseases
D. Less hunger
3. Which group is NOT mentioned to be influenced more by night light?
A. The old people
B. Young students
C. People with “three highs”
D. People with sleeping problems
4. What can we use to keep the bedroom dark?
A. Bright ceiling lights
B. Thick curtains or an eye mask
C. Warm quilts
D. Colorful wall paintings
5. What is the main idea of the passage?
A. How to choose a useful night light
B. The harm of night light and solutions
C. The importance of daily exercise
D. Ways to choose healthy electronics
答案
1. B
2. C
3. B
4. B
5. B
词汇积累
1. behavior n. 行为
2. charger n.充电器
3. harm v. 伤害；损害
4. risk n. 风险
5. abnormal adj. 不正常的
6. completely adv. 完全地
7.electronic devices电子设备
8. be afraid of the dark 怕黑
9. stop…from doing sth. 阻止……做某事
10. have trouble doing sth. 做某事有困难
11. These common behaviors are actually bad for our health.
这些常见的习惯实际上对我们的健康有害。
12. Light at night stops the body from producing melatonin.
夜晚的光线会阻止身体产生褪黑素。
13. Keeping our bedroom completely dark is a simple way to protect health.
保持卧室完全黑暗是保护健康的简单方法。
