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微量元素中，大多数为金属过渡元素，在已知的１４种必需元素中，金属元素占１０种。铁为必需元素之一，在人体分布很广，几乎所有组织都含铁，是人体发育的建筑材料［１］。正常情况下可从食物及水内获取补充，在吸收量和排泄量之间能保持平衡的结果。笔者观察住院的３４例慢
Among trace elements, most of them are metal transition elements, of which metal elements account for 10 of the 14 required elements. Iron is one of the necessary elements in the human body is widely distributed, almost all organizations have iron, is the development of human body building materials [1]. Under normal circumstances can be obtained from the food and water supplement, the amount of absorption and excretion can maintain a balance between the results. I observed inpatient 34 cases of slow