随着科学的发展，低浓度铅对健康的危害日益被人们所认识，众多报道［1－3j表明儿童机体对铅毒性的敏感性较高。为了解我市儿童血铅水平，从而更好地保护儿童身体健康。我们于1997～1998年对扬州市480名小学生进行了血铅水平及其影响因素的调查。1对象与方法1．1对象：选择3所 With the development of science, the health hazard of low concentration of lead is increasingly recognized. Many reports [1-3j] indicate that children’s body is more sensitive to lead toxicity. In order to understand the city’s blood lead levels in children, so as to better protect children’s health. We conducted a survey of blood lead levels and influencing factors among 480 pupils in Yangzhou from 1997 to 1998. 1 objects and methods 1.1 object: select 3