题目内容：

    More primary care doctors in a community (社区) appear to lead to improved life expectancy for people living there，though a lack of such physicians across U.S. could be a cause of concern for overall population health in years to come.

For the study, researchers looked at physician counts per 100,000 people in a range covering 2005 to 2015 in the U. S.，along with life expectancy and specific causes of death. They found that an increase of 10 primary care physicians per 100,000 population was associated with a 51. 5-day increase in life expectancy, while an increase of 10 specialty physicians per 100, 000 population increased life expectancy by 19. 2 days. An increase in primary care physicians also was associated with reductions of many deaths including heart diseases and cancers.

Along with those findings, though, the study said many communities did not have primary care physicians in 2015，with the decline in supply more prominent in rural areas than their urban areas. Many believe that a well-functioning health care system requires a solid foundation of primary care, however, payment difference between primary care and technical specialties continue to dispirit the U. S. primary care physician workforce.

“Higher pay and lifestyle preferences lead most students to choose non-primary care fields, even when their hearts say primary care,” the study said. “We must turn this trend around with practical changes in physician payment policy; no amount of superb primary care training or creative practice reform will prevent further declines in primary care physician, which will lead to worsening health for the United States. ”

The study’s researchers conclude that future research should focus on the “quality and cover of primary care，types of primary care physician training and service offerings, and effective access rather than just supply”.

1.What does the author intend to do in Paragraph 2?

A.Provide some data for the readers.

B.Offer some tips on life expectancy.

C.Add some background information.

D.Stress the importance of primary care.

2.Which of the following best explains “prominent” underlined in Paragraph 3?

A.Adequate. B.Considerate.

C.Obvious. D.Reasonable.

3.What discourages young people from taking up the primary care?

A.Primary care is badly paid.

B.They have to work in rural areas,

C.They need to face fierce competition.

D.Primary care lacks superb training

4.What is the main idea of the text?

A.Primary care can lengthen life.

B.Primary care needs improving.

C.Primary care physicians are decreasing.

D.Higher pay attracts more primary care physicians