方法采用整群抽样法，选取浙江省4个县区的42 065名中小学生伤害的认知和行为进行问卷调查。
Methods a questionnaire was used to survey injury -related knowledge, attitude and behavior of 42 065 students drawn from 4 counties of Zhejiang province by using a cluster sampling method.
方法采用整群抽样法，选取浙江省4个县区的42 065名中小学生伤害的认知和行为进行问卷调查。
Methods a questionnaire was used to survey injury -related knowledge, attitude and behavior of 42 065 students drawn from 4 counties of Zhejiang province by using a cluster sampling method.
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