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为了解我市５岁以下儿童营养状况，我们于１９９７年６月～１９９９年６月对秦皇岛市５岁以下儿童１４９１７例进行营养监测和干预。现将结果报告如下。１ 对象与方法１．１ 对象 居住在本市城市、农村，散居、集体５岁以下儿童为监测对象。１．２ 样本量的确定 估计营养?
To understand the nutritional status of children under 5 in our city, we conducted nutrition monitoring and intervention on 14917 children under 5 years of age in Qinhuangdao from June 1997 to June 1999. The results reported below. 1 Subjects and methods 1.1 Object Living in the city city, rural areas, diaspora, collective children under 5 years of age as the monitoring object. 1.2 Sample size to determine the estimated nutrition?