The surgeon suggested that he __________ at once.

A．needed operating on

B．needed operation

C．need operating on

D．need to be operated

脾梗死在CT上表现为边缘清楚的低密度影，下列描述哪一个是正确的（）.

A.常为圆形或椭圆形，位于脾实质中心

B.常为圆形或椭圆形，紧贴脾包膜

C.常为三角形或梭形，尖端指向包膜

D.常为三角形或梭形，尖端指向脾门

E.以上都不对