单项选择题

The author refers to the excessive intake of alcohol, tobacco, and drug in order to illustrate that ______.

A．some health problems cannot be solved by better medical care
B．his use of alcohol and other substances is harmful to health
C．poor health results from tack of proper medical care
D．wealth may contribute to poor health status
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单项选择题
The passage would probably be followed by ______.
A．suggestions for specific proposals to improve the quality of life in America
B．a listing of the most common causes of death among male and female adults
C．an explanation of the causes of poverty in America, both absolute and relative
D．a proposal to ensure that residents of central cities receive more and better medical care
单项选择题
In discussing the forces that influence health, the author implies that medical care services are ______.
A．a special aspect of an individual's environment
B．a function of an individual's behavior pattern
C．becoming less important as technology improves
D．too expensive for most people
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