阅读下面短文，根据短文内容回答下列各题。
Now many people are too busy to sleep. Ask most people what they need more besides（除了）money, the answer may be the word "sleep".
Most people need from seven to eight hours of sleep a day, but many only sleep for about six hours. It's bad for our health, like being sleepy all day. Although it sounds like an old story, people need their good rest. If people don' t get enough sleep, they are not going to look well. Many people don' t under-stand the idea of good sleep. It's not good to go to bed late and sleep on weekends. People must go to bed and get up at the same time every morning. And then they can fall asleep easily and have enough sleep. They can look well and have enough energy（能量） to study or work.
Not sleeping enough, people can also sleep more. Sleeping late on weekends can make people more tired because they are sleeping outside of their schedule（时间表）. How much sleep people need is very different. While some people need 8 to 10 hours of sleep a night, others only need 5 hours.
1．Why don't many people get enough sleep?
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2．How long do most people need to sleep a day?
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3．What can people do if they want to fall asleep easily and have enough sleep?
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4．How do people feed when they sleep late on weekends?
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5．Do people need the same sleep?
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