—Excuse me，may I have a word with Mr. Zhang？

—I’m afraid he’s not_______now．He’s having a class upstairs．

A．comfortable

B．suitable

C．available

D．acceptable

患者胸闷气短，甚则胸痛彻背，心悸汗出，腰酸乏力，畏寒肢冷，唇甲淡白，舌淡白，脉沉微欲绝。治疗应首选（）

A.参附汤合右归饮

B.人参养荣汤合左归饮

C.炙甘草汤合生脉散

D.苓桂术甘汤合左归丸

E.苏合香丸合左归饮