那些吸烟过度的人一般都活不长。
影响大众健康的因素包括吸烟过度、酗酒以及饮水污染。
Factors affecting general health include excessive smoking, drinking of alcohol and polluted water supplies.
该研究的作者调查了12395名学生并分析了九种危险行为，包括过度使用酒精、非法使用毒品、大量吸烟、频繁使用媒体和逃学。
The study's authors surveyed 12,395 students and analyzed nine risk behaviors, including excessive alcohol use, illegal drug use, heavy smoking, high media use and truancy.
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