科学家们分析了土壤中的农药残留物。

Scientists analyzed the soil for residues of pesticides.

研究人员指出，与尿液中未检测到农药残留的儿童相比，农药残留物含量高的儿童患多动症的风险是其两倍。

D. H. D. in the children. The scientists reported that the risk of the disorder was almost double in children with high levels compared to those with no measurable level.