With his horse ____to the tree, the man had a rest in the shade.

A．tying

B．tie

C．being tied

D．tied

患者面色萎黄，头晕眼花，四肢倦怠，气短少言，心悸不安，食欲减退，舌淡苔白，脉细弱。治疗应首选（）

A.四物汤

B.归脾汤

C.当归补血汤

D.四君子汤

E.八珍汤