对于IC卡加油机系统，卡上金额用完后（），有利于加油站的管理，方便了用户

A、必须通过IC卡发行机构更换新卡

B、到加油站进行结算

C、可以通过IC卡发行机构增加卡上金额

D、到银行进行结算

The nurse is caring for four clients on a step-down intensive care unit. The client at the highest risk for developing nosocomial pneumonia is the one who（）

A. has a respiratory infection.

B. is intubated and on a ventilator.

C. has pleural chest tubes.

D. is receiving feedings through a jejunostomy tube.