文档介绍：Sleep
演讲者:束天媛
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Did you sleep the day away on March 21?Well, you should have done that because it was World Sleeping Day. This is the one day of the year when people around the world care about their sleep and ask themselves a lot of questions about sleep.
The 21 of March
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Why do we need sleep
Why do we have sleep? Nobody as yet can give a perfect answer to this question. However, tests have shown that lack(缺少) of sleep over about four weeks leads to a strong drop in body temperature, great weigh loss and finally sickness.
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Different people need different amounts of sleep. Eight hours a night is considered(被认为) the average amount of sleep. For teenagers the least number of sleeping hours advised by doctors are ten hours for primary school students, nine for junior highs(初中生) and eight for senior highs(高中生).
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Some people seem to get along just fine with very little sleep at night. Leading American scientist Thomas Edison said that sleep was a waste of time. He did, however, take naps during the day. On the other hand. Albert Einstein, another great scientist, said he needed at least ten hours’ sleep a night.
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Here are some of the most useful suggestions, for a good night’s sleep:
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Go to bed at the same time.
Use your bed only to sleep.
Don’t exercise in the evening.
Keep the bedroom dark and quiet.
Drink a glass of milk before sleep.
Stop looking at the watch while you can’t sleep!
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Thank you!
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Interesting Questions :
the red house is on the left. the green house is on the right. then where is the white house?
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Why is letter “e” so important?
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