方法拟定统一的调查标准和干预计划，问卷由经过培训的调查员入户调查。
Methods Formulate out unified investigative standard and intervention program. Investigators severely trained make out questionnaire by household survey.
方法拟定统一的调查标准和干预计划，问卷由经过培训的调查员入户调查。
Methods Formulate out unified investigative standard and intervention program. Investigators severely trained make out questionnaire by household survey.
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