It took more than twenty years for the great artist       _the painting was finished completely.

A．as

B．before

C．after

D．when

下列哪项是全胃肠外营养的适应证（）

A.胃溃疡术后

B.阑尾切除术后

C.全髋置换术后

D.肺叶切除术后

E.严重烧伤、感染患者