I would appreciate _____ if you could remain silent until spoken to.

A．it

B．that

C．these

D．them

在手术中发现患侧肾脏动静脉均明显损伤，活动出血，应采取的措施为

A．肾切除

B．血管修补

C．肾部分切除

D．创面缝扎止血

E．以上均不正确