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.

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。

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The truancy phenomena of college students happen frequently. The situation is so complicated with various reasons.

高校学生旷课现象时有发生，情况复杂，原因众多。

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Sport, as a compulsory course of college, has not been the attention of college students, so the sports course has become the major leave of absence or truancy of college students.

体育运动作为大学阶段的一门必修课程，一直未得到大学生的重视，因此大学的体育课程也就成了大学生主要的请假或逃课的科目之一。

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Dr Seeley says that truancy often begins after students' transition from middle school to high school in the US, at 13 or 14 years old.

BBC: NEWS | UK | Education | Truancy: How do countries compare?

He urges schools to devote more resources to summer programmes before students begin high school and to target students most at risk of chronic truancy - those from low income families and low achievers.

BBC: NEWS | UK | Education | Truancy: How do countries compare?

Importantly, the losers did not experience an increase in truancy compared to otherwise similar students who did not participate in the lottery, meaning that the lottery has increased motivation among winners, not decreased it among losers.

FORBES: School Choice in the Long Run