目的：观察骨延长术对血清微量元素的影响。
Objective: To observe the effect of bone lengthening on the serum trace elements.
目的探讨营养性贫血与血清微量元素的关系。
Objective To explore the relationship of trace elements in sera of children with nutritional anemia.
检测血清微量元素锌、铜，以及血小板计数。
Trace element(Zinc & Copper) and Platelet count were tested.
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