As we all know, Asia is_______ Europe.

A．four times the size of

B．the size four times of

C．four times the size as

D．four times as the size of

治疗恶性贫血选用（）

A.叶酸

B.维生素B₁₂

C.右旋糖酐

D.甲酰四氢叶酸钙

E.右旋糖酐铁