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据报道，我国儿童中约有30％存在不同程度的锌缺乏[1].人发可记录较长一段时间人体内的微量元素水平[2]，发锌一般认为可以反映膳食锌的长期供给水平。为了解齐齐哈尔市地区儿童锌的营养状况，我们对齐齐哈尔市南浦地区3～5岁儿童进行了体格检查和发锌的测定。1对象与方法齐齐?
It is reported that about 30% of children in our country have varying degrees of zinc deficiency. [1] Human hair can record the levels of trace elements in the human body for a long time [2], hair zinc is generally considered to reflect the long-term supply of dietary zinc . To understand the nutritional status of zinc in children in Qiqihar city, we conducted physical examination and zinc determination of children aged 3-5 in Nanpu District, Qiqihar City. 1 objects and methods together?