The blood lead level of children having bad habits of diet and behavior was higher than that of not having bad habits, but there had no significant statistical difference(both P>0.05).
有不良饮食、行为习惯的儿童血铅水平高于无不良习惯的儿童血铅水平，但差异无统计学意义（均P>0.05）。
In children with moderate and severe lead poisoning, the basophilic stippling erythrocyte increased significantly with the increase of blood lead level.
中度以上铅中毒儿童的血铅与嗜碱性点彩红细胞铅中毒有显著的相关关系。
Objective: to test lead level in blood of children with learning difficulty to investigate the relationship of children's intelligence and lead level in blood.
目的：检测学习困难儿童的血铅水平，以分析儿童智力与血铅的关系。
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