Wespendaboutone-thirdofourlivesasleep.Thismaysoundlikea...

問題詳情：

We spend about one-third of our lives asleep. This may sound like a lot of time，but it is not wasted. Our bodies need sleep to stay healthy. Not getting enough sleep can make us sick.

Sleep and our immune(免疫)system

The immune system protects the body from diseases and infections(傳染). Not getting enough sleep hurts this protective system.

The Mayo Clinic is a research hospital in the United States. Its website explains that when we sleep our bodies produce proteins(蛋白質) that support sleep and help us fight infections. They add that infection-fighting antibodies(抗體) are reduced during periods when you don’t get enough sleep.

A new study from the University of Washington in the U.S. seems to confirm this. Dr. Nathaniel Watson was the lead writer of the study. Watson says his study shows that the immune system works best when the body gets enough sleep. For the study，Watson and his team studied 11 pairs of twins. This is an important difference from other sleep studies. Other research did not study twins. Researchers found that the twin who slept less had a weaker immune system.

Watson says his study showed for the first time that a long-term lack(缺乏) of sleep shuts down parts of the immune system. He says parts that move white blood cells around the body are influenced. White blood cells fight infections in the body.

Watson’s study provides more evidence(*據) that sleep is important to“overall health”. And sleep is especially important to immune health.

The researchers published their findings in the magazine Sleep.

How much sleep is enough?

To stay in good health，experts at the Mayo Clinic say that adults should get 7 to 8 hours of sleep. Teenagers need 9 to 10 hours. And school-aged children may need more than 10 hours of sleep a night.

Experts say our sleep becomes poor in our 30s. By the time we reach our 50s，the average person has lost 50 percent of their ability to have a restful sleep. These people also have trouble falling asleep and staying asleep through the night. From middle age on，they say these problems only get worse，and they can influence our health.

Signs you may not be getting enough sleep

●You’re always hungry or you’ve gained weight.

●You have trouble making decisions.

●You have trouble remembering things.

●Your skin doesn’t look good.

●You are having trouble seeing.

1. From the first three paragraphs we know that        .

A. it is a waste to spend about one-third of our lives asleep

B. we’ll become seriously ill if we don’t have enough sleep

C. enough sleep does good to infection-fighting antibodies

D. immune system is protected when people begin to sleep

2. From Watson’s study，we know        .

A. enough sleep helps the immune system work well

B. the study of twins is a kind of common sleep study

C. twins need less sleep but have stronger immune system

D. sleeping for a long time is important to immune health

3. Which of the following is right according to the passage?

A. People don’t need 7 to 8 hours of sleep a night in their fifties.

B. The less you sleep every night，the more weight you’ll lose.

C. Teenagers should get more than 10 hours of sleep a night.

D. If your memory gets worse，you may not get enough sleep.

4. What will probably be written in the following part?

A. How to improve your sleep

B. How important enough sleep is!

C. How amazing if you look good!

D. How to avoid trouble of seeing

【回答】

1.C

【解析】細節理解題。根據文章第三段最後一句“…infection-fighting antibodies(抗體) are reduced …when you don’t get enough sleep.”如果你沒有得到充足的睡眠，抗體就會被減少，可知，充足的睡眠對抗體有益，故選C。

2.A

【解析】細節理解題。根據文章第四段“Watson says his study shows that the immune system works best when the body gets enough sleep Watson說他的研究表示，剛身體得到充足的睡眠，免疫系統就會工作得很好”，可知，充足的睡眠對自身免疫系統有好處，故選A。

3.D

【解析】綜合判斷題。根據文章最後“Signs you may not be getting enough sleep 你沒有得到充足睡眠的訊號”中的第三條“You have trouble remembering things 記憶困難”可知，當你的記憶越來越差，可能是因為睡眠不足，故選D。

4.A

【解析】推理判斷題。文中已經說明了睡眠充足的重要*，故B選項錯誤；C、D兩項是文章最後一段最後兩條的眼神，故排除C、D兩項；文章最後描述了一些人正受睡眠問題的困擾，所以接下來應是就如何改善睡眠進行探討。故選A。

知識點：健康保健類

題型：閱讀理解