What is the passage mainly about？A．How to stage anti-smoking campaigns.B．The effects of th
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What is the passage mainly about？
A．How to stage anti-smoking campaigns.
B．The effects of the report on smoking and health.
C．Tax as the surest path to cut smoking.
D．The efforts to cut down on teenage smoking.
请帮忙给出正确答案和分析，谢谢！
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正确答案：D
主旨题。本文开篇总述美国反烟战的历史，以及反烟战的成效和不足。接着作者集中探讨针对青少年的反烟运动的最有效武器——税收，以及在青少年身上取得的效果。据此可判断，本文的主题是为减少青少年吸烟而付诸的努力，故[D]为答案。