介词to用法分析 When 38 st

问题描述

When 38 states and the District of Columbia reported cases of elevated blood lead levels to the US Centers for Disease Control and Prevention from 1999 to 2010, most reported fewer than half of the numbers that were expected, the new study says.

上文中的介词 to 是表示什么样的逻辑关系？谢谢。 

老师答疑

曹老师：

report sth to sb向某人报告某事。表示报告的对象、接受者。