超声检查见颈总动脉壁内膜分离，将血管分成真假两个腔，分离的内膜回声随心动周期不停的摆动。彩色多普勒超声见真腔内血流大致正常，假腔内血流紊乱，呈五彩镶嵌样表现，请就此超声表现作出诊断

A．真性颈动脉瘤

B．假性颈动脉瘤

C．夹层颈动脉瘤

D．颈动脉扭曲

E．颈动脉体瘤

______ is too difficult in the world if you put your heart into it.

A．Everything

B．Something

C．Nothing

D．Anything