. Mary spends a lot of money on clothes _______ her family is not rich.

A．because

B．though

C．if

D．so

如发现异常，采取哪种手段进行治疗

A．促排卵药物治疗
B．腹腔镜或IVF-ET
C．IUI
D．黄体支持
E．期待治疗