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为有效地控制学生中肠道蠕虫感染，自1992－1995年我们对红山区所有学校的学生采取每年集体投药两次，并坚持开展健康教育，培养学生良好的卫生习惯的综合防治方案，使中小学生蛔虫感染率大幅度下降。1对象与方法1．1药物驱虫：全区中小学生自1992－1995年连续4年分春秋两次在?
In order to effectively control intestinal worm infections among students, we conducted collective drug administration twice a year for all students in Hongshan District from 1992 to 1995, and insisted on carrying out health education and developing a comprehensive prevention and control program for students’ good health habits. Ascaris infection rate dropped significantly. 1 objects and methods 1.1 drug deworming: region primary and secondary students from 1992 to 1995 for four consecutive years in spring and autumn twice in?