In the U.S., surveys have found that nearly one in 10 school-agedkids have been diagnosed with thecondition, according to the CentersforDiseaseControlandPrevention.
美国疾病预防控制中心(Centers for Disease Control and Prevention)称，在美国的研究发现，近乎十分之一的学龄儿童被诊断出有多动症。