There are too many difficulties for us _______ . We really don’t know _______ to do.

A．to deal with, what

B．to deal with, how

C．to do with, how

D．to do with, what

本病诊断为

A．经行头痛

B．经行身痛

C．痛经

D．经行感冒

E．经行泄泻