单项选择题

What can we learn from Paragraph 1

A．People who sleep less than 8 hours a day are more prone to illness.
B．Poor sleep quality may be a sign of physical disorder.
C．Stroke is often associated with sleep.
D．Too much sleep can be as harmful as lack of sleep.

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单项选择题

What does the author imply speaking of the sleep problems that doctors face

A．Doctors' sleep is deprived by residents.
B．Sleep-deprived doctors are intoxicated.
C．Doctors tend to neglect their own sleep problems.
D．Doctors often need little sleep to keep them energetic.

单项选择题

What docs Dr. Charles Binkley mean by doctors should be bound by their conscience, not by the government in Paragraph 5

A．Doctors should not abide by government's regulations.
B．The government is interfering too much.
C．The regulations about workweek and work shift are too specific.
D．Law can not force a doctor to sleep while his conscience can.