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为了解儿童体内锌、铁、钙的含量,为了进一步提高小儿健康水平,并为防治营养缺乏症提供依据,我们于1990年6月对校部幼儿园的小儿做了体检及微量元素和血红蛋白的测
In order to understand children’s zinc, iron and calcium content, in order to further improve the level of children’s health, and to provide a basis for the prevention and treatment of nutritional deficiency, we conducted a physical examination and trace elements and hemoglobin test in children in kindergarten in June 1990