* * 损伤后并发尿潴留患者，顺利插入导尿管后，下一步处理是()

A．导出尿液后立即拔出导尿管

B．留置导尿管2～4周

C．留置导尿管并作耻骨上膀胱造瘘

D．拔除导尿管并作耻骨上膀胱造瘘

E．永久性膀胱造瘘

After using a Halon extinguisher，it should be（）.

A.put back in service if more than 50% of the charge remains

B.repainted

C.discarded

D.recharged