感染邪毒产后发热的病因病机是

A．产后百脉空虚，邪毒乘虚侵入胞中，正邪交争

B．产后元气虚弱，腠理不实，风寒袭表，正邪交争

C．产后恶露不下，瘀血停滞，阻碍气机，营卫失调

D．产后失血过多，阴血骤虚，阳无所附，阳浮于外

E．以上都不是

He once remarked that "All happy families ________ one another, but each unhappy family is unhappy in

its own way".   [ ]

A. like          

B. appear        

C. resemble        

D. represent