2. 外语
  3. Insomnia is characterized by the inability to sleep or the inability to remain asleep for a reasonable period. Insomniacs typica

Insomnia is characterized by the inability to sleep or the inability to remain asleep for a reasonable period. Insomniacs typica

admin2011-04-03  45
问题 Insomnia is characterized by the inability to sleep or the inability to remain asleep for a reasonable period. Insomniacs typically complain of being unable to close their eyes or "rest their mind" for more than a few minutes at a time. Both organic and nonorganic insomnia constitute a sleep disorder. It is often caused by fear, stress, anxiety, medications, herbs, caffeine, depression or sometimes for no apparent reason. An overactive mind or physical pain may also be causes. Finding the underlying cause of insomnia is usually necessary to cure it.
Types of insomnia
1.Transient insomnia lasts from one night to a few weeks, but it seems longer to sufferers. Most people occasionally suffer from transient insomnia due to such causes as jet lag or short-term anxiety. If this form of insomnia continues to occur from time to time, the insomnia is classified as intermittent.
2. Acute insomnia is the inability to consistently sleep well for a period of between three weeks to six months.
3. Chronic insomnia is regarded as the most serious. It persists almost nightly for at least a month.
How many types of insomnia are listed in the article?
选项 A、1.
B、2.
C、3.
D、4.
答案C
解析
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