治疗痛经气血虚弱证，应首选的方剂是（）。
A.黄芪建中汤
B.归肾丸
C.八珍汤
D.人参养营汤
E.十全大补汤
参考答案：A
It’s true that many retirees continue working not only for their self-fulfillment but also for ______.
呃逆病变的关键脏腑是（）
A.肝
B.脾
C.肺
D.胃
E.胆
