铅,即使微量也会影响儿童的智商吗?波士顿儿童医学中心和哈巴特大学的医师们作出了肯定的回答。这次调查的对象是马萨诸塞州小学的一、二年级学生,医师们收集并分析了拔下的儿童乳牙。在这以前的调查中多半是分析血中含铅量,尽管在血中含的铅能反映出在调查时的铅摄取量,但不能显示出长期的曝露量。而牙齿中的铅则可能判断拔下以前曝露的累计量。这就是这次调查的特点。从分析 Lead, even trace amounts, can affect children’s IQ? Affirmative responses were made by Boston Children’s Medical Center and physicians at the University of Hobart. The survey was conducted for first- and second-year students at primary schools in Massachusetts where physicians collected and analyzed unplumped children’s deciduous teeth. In previous surveys, blood lead levels were mostly analyzed. Although lead in blood reflects the level of lead intake at investigation, it does not show long-term exposure. Lead in the tooth may determine the cumulative amount of previous exposure. This is the characteristic of this survey. From analysis