铅是一种具有一定毒性的重金属元素,不应存在于人体内。然而,由于环境中铅的普遍存在,人体内或多或少都累积了一定量的铅。当铅在体内的量超过一定水平时,即可引起机体一系列的病理变化,尤其是儿童铅污染,已成为威胁儿童健康,影响儿童生长发育的重要因素之一。晓玉夫妻俩经 Lead is a toxic heavy metal that should not be present in the body. However, due to the prevalence of lead in the environment, a certain amount of lead accumulates in the body more or less. Lead in the body when the amount exceeds a certain level, can cause a series of pathological changes in the body, especially children lead pollution, has become a threat to children’s health, one of the important factors affecting children’s growth and development. Xiao Yu couple both