胃脘灼痛，痛势急迫，烦怒口干的胃痛，治选最佳方剂为（）
A.调营敛肝饮
B.一贯煎
C.柴胡疏肝汤
D.丹栀逍遥散
E.左金丸
参考答案：D
化简并求值：（3a-b）2-3（2a+b）（2a-b）+3a2，其中a=-1，b=2．
I have devoted four weekends to writing papers and now I feel I ________ a rest.[ ]
A．deserve
B．preserve
C．perceive
D．receive
