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本文对ＩＤＤ病区不同智商的儿童发中铜、锌、锰、锂作了分析，结果显示，病区智低组儿童发中铜、锌、锰、锂均高于中等智商组，病区与非病区智低组比较，两组锰含量有显著性差异（Ｐ＜０．０２５），病区高于非病区；病区组锂显著低于非病区（Ｐ＜０．０５）。中等智力组仅病区儿童发锂显著低于非病区（Ｐ＜０．０５），其余元素无显著差异。
In this paper, we analyzed the contents of copper, zinc, manganese and lithium in children’s hair with different IQ in IDD ward. The results showed that the contents of copper, zinc, manganese and lithium in children’s hair were higher than those in middle IQ group, Compared with non-ward chi-liang group, the manganese content of the two groups was significantly different (P <0.025), the ward was higher than the non-ward; the ward Li group was significantly lower than the non-ward (P <0.05). Children in the middle intelligence group only had significantly lower lithium than those in the non-endemic area (P <0.05), and no significant differences were found in other elements.