2. 外语
  3. Sleep is an important part of our lives. We spend about one-third of our lives sleeping. For millions of people,【C1】______, gett

Sleep is an important part of our lives. We spend about one-third of our lives sleeping. For millions of people,【C1】______, gett

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问题     Sleep is an important part of our lives. We spend about one-third of our lives sleeping. For millions of people,【C1】______, getting enough sleep is a continuing struggle. A recent study found that thirty-five percent of Americans have【C2】______going to sleep or staying asleep. The problem is called insomnia. Insomnia exists【C3】______a person is not able to get the【C4】______of sleep needed to operate effectively. Insomnia is not【C5】______in numbers of hours of sleep. This is because different people need【C6】______amounts of sleep to feel rested. The most common problems【C7】______from insomnia are sleepiness and trouble in completing work. Other problems are emotional disorders and difficulty【C8】______thinking. The treatments for【C9】______were discussed at a recent meeting of the Association of Professional Sleep Societies. The group’s sleep experts say there are three kinds of insomnia. One【C10】______is called transient insomnia. It【C11】______just a few days. It is a result of moderate tension. The tension can be caused by a long airplane flight or a brief stay in a hospital. 【C12】______kind is called short-term insomnia. It lasts several weeks and results from more【C13】______tension. The tension may be caused by problems at work or at home, a major sickness or the death of a loved one. The third kind of insomnia is called【C14】______It lasts longer than several weeks. It often is a sign of severe physical or【C15】______problems. Sleep experts say anyone with long-term insomnia should be examined so the cause can be found and treated.
    Many things we eat or drink can affect our【C16】______Drinks containing alcohol or caffeine can block sleep. 【C17】______can some medicines. Other causes of insomnia include breathing problems or sudden, uncontrolled body movements during sleep. Because insomnia has so many causes, not all treatments are【C18】______for everyone. But experts have offered some simple ideas that work for most people. If【C19】______to sleep, they say, get up and go to another room, if possible. Stay up until you are really【C20】______, then return to bed. Get up at the same time every day. Do not exercise just before going to bed. And, do not worry about past problems or future plans.
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