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在《人虱的调查和防治的研究(Ⅰ)北京市丰台区小学生头虱感染调查及药物防治》工作的基础上,我们选择了两所小学,于1986年2月～1987年2月进行了6次头虱季节分布调查。
Based on the survey of “human lice and its prevention and control (Ⅰ) investigation of head lice infection and drug control of primary school students in Fengtai District of Beijing”, we selected two primary schools and conducted from February 1986 to February 1987 Investigation on seasonal distribution of 6 head lice.