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加格达奇区中小学生视力监测动态分析黑龙江省大兴安岭地区卫生防疫站（１６５０００）宋江华为了解中小学生视力减退变化规律，现对加格达奇区１９８９～１９９１年中小学生１６００名视力监测情况作一动态分析。资料来源及方法：资料来源于加格达奇实验中学、育才小学学...
Dynamic Analysis of Primary and Secondary School Students ’Vision Monitoring in Jiagedaqi Health and Anti-Epidemic Station, Daxinganling District, Heilongjiang Province (165000) Song Jianghua To understand the changing rules of vision loss of primary and middle school students, 1600 cases of primary and secondary students’ visual acuity monitoring in Jiagedaqi District A dynamic analysis. Data sources and methods: data from the Jiagedaqi Experimental Middle School, Yucai primary school ...