治疗绝经前后诸症针灸的基本治法为滋补肝肾、调理冲任，选用______、______经穴及相应的背俞穴为主。

Was it in 1997______he was still at middle school_______ this boy became an expert at computer?

A．that; where

B．when; where

C．in which; in which

D．when; that