Insomnia is the inability to fall asleep or sleep restfully. It is a problem to nearly everyone at some time. A person may be awake for an hour in the middle of the night and then, next morning, feel that he hardly slept all night. Normally, worrying about not getting enough sleep is the worst aspect of most insomnia. If insomnia is recurrent, however, it is important to find its possible causes and try to correct them, with the help of a doctor if necessary.
A large number of simple factors may make it difficult for someone to fall asleep or remain asleep. His mattress may be too soft or too hard. The bedroom itself may be overheated or too cold. If it is not dark enough, or too noisy, this may cause difficulty in sleeping. Eating shortly before going to bed may also be responsible for insomnia. Stimulating drinks, such as tea or coffee, can also keep people awake.
Inability to fall asleep is sometimes a symptom of emotional or mental disorders. Insomnia
A. the quality of his bedroom
B. eating before going to bed in two hours
C. overhappiness or sorrow
D. he didn't take a warm bath before going to bed
Passage 4
At the fall 2001 Social Science History Association convention in Chicago, the Crime and Justice network sponsored a forum on the history of gun ownership, gun use, and gun violence in the United States. Our purpose was to consider how social science history might contribute to the public debate over gun control and gun rights. To date, we have had little impact on that debate. It has been dominated by mainstream social scientists and historians, especially scholars such as Gary Kleck, John Lott, and Michael Bellesiles, whose work, despite profound flaws, is politically congenial to either opponents or proponents of gun control. Kleck and Mark Gertz, for instance, argue on the basis of their widely cited survey that gun owners prevent numerous crimes each year in the United States by using firearms to defend themselves and their property. If their survey respondents are to be believed, American gun owners shot 100,000 criminals in 1994 in self-defense&mda
A. It has little influence on the forum sponsored by the Crime and Justice network.
B. Neither supporters nor opponents of gun control cite the works of scholars.
C. The works of mainstream social scientists have great impact on it.
D. Many social science historians have so far failed to take part in it.
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