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1980年10月我市曾对城前、北宿四所中小学校2550名学生进行一次生长发育调查．时隔十年，采用统一测试仪器和方法，于1990年10月再次对原点校3050名中小学生进行了调查．现将两次调查结果比较分析如下．1生长发育水平显著提高两次调查结果相比，近十年来我市农村儿童少年身高、
In October 1980, the city once conducted a survey on the growth and development of 2550 students from four primary and secondary schools in Beichen City. After a lapse of ten years, a unified test instrument and method were adopted. In October 1990, a survey was conducted again on 3050 primary and secondary school students in the original school. Now the two survey results are compared as follows. A significant increase in the level of growth and development Compared to the findings of the two surveys in recent years, the height of rural children and adolescents in our city,