[单项选择]Sleep is a funny thing. We’ re taught that we should get seven or eight hours a night, but a lot of us get by just fine on less, and some of us actually sleep too much. A study out of the University of Buffalo last month reported that people who routinely sleep more than eight hours a day and are still tired are nearly three times as likely to die of stroke--probably as a result of an underlying disorder that keeps them from snoozing soundly.
Doctors have their own special sleep problems. Residents are famously sleep deprived. When I was training to become a doctor, it was not unusual to work 40 hours in a row without rest. Most of us took it in stride, confident we could still deliver the highest quality of medical care.
Maybe we shouldn’ t have been so sure of ourselves. An article in the Journal of the American Medical Association points out that in the morning after 24 hours of sleeplessness, a person’ s motor performance is
A. the U. S. legislators are alarmed about sleep-deprived doctors.
B. the doctors should sleep much more than the ordinary people.
C. the U. S. government as well as many ordinary people never pays enough attention to the problems.
D. at the very beginning, the doctors insist that their sleep problems will lead to serious consequences.