Bob did everything     than the other three students. Our teacher chose him to be our monitor.

A．much careful

B．much carefully

C．much more careful

D．much more carefully

有关静脉尿路造影腹部压迫的叙述，错误的是

A．防止对比剂流入膀胱
B．压迫点为脐下方两侧
C．压迫球呈正八字形放置
D．压力为5.3～8.0kPa
E．观察全尿路时解除压迫