No one is      island. We share the world with parents, friends, teachers and classmates. Most of the time, we get on well with each other. But sometimes we disagree as well.

A. the

B. an

C. a

患者，男性，五十六岁。患肺痨五年，刻下证见咳嗽无力，声低懒言，痰中夹血，血色淡红，午后低热，面白颧红。舌嫩红有齿痕，苔薄白，脉细弱数。如果病人咳嗽加重成为主证，可选用：（）

A.海藏紫苑汤

B.养阴清肺丸

C.白及批把丸

D.大补元煎

E.黛蛤散