What happened to the man and the woman
[A] Their English teacher was angry with them.
[B] They didn’t finish their homework.
[C] The man finished his homework, but the woman didn’t.

痛经的主要病机是（）

A.寒湿凝滞

B.血海空虚

C.胞脉失于滋养

D.阳虚内寒

E.不荣则痛