鳃裂囊肿的CT征象为（）

A.边界清楚、圆形或卵圆形低密度囊性肿块

B.平扫时囊壁显示欠清，增强后囊壁轻度强化

C.CT值在0～20HU，囊壁薄

D.继发感染时囊壁增厚，囊液密度增高

E.有时可见囊肿位于颈内和颈外动脉之间

The final score of the basketball match was 96-97. We were only _____ beaten.

A．tightly

B．slightly

C．narrowly

D．roughly