. _______ the fact that he was seriously ill, he still decided to come to the meeting.

A．Although

B．Though

C．Despite

D．While

CT增强扫描时，肝海绵状血管瘤与肝癌的主要鉴别点是（）

A.动脉期高强化

B.实质期密度降低

C.门脉期密度降低

D.病灶密度升高快，降低慢

E.边缘清晰