单选题The passage is mainly focused on _____.Athe limits of medicineBthe life hazards in the U.S.Cthe barriers to a longer lifeDthe problems in health investment
单选题
The passage is mainly focused on _____.
A
the limits of medicine
B
the life hazards in the U.S.
C
the barriers to a longer life
D
the problems in health investment
参考解析
解析：
本文分析了美国在医药方面投入巨大但对改善公共健康的效果却不明显的原因，指出仅靠药物不能使人更加长寿。
本文分析了美国在医药方面投入巨大但对改善公共健康的效果却不明显的原因，指出仅靠药物不能使人更加长寿。
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