All these gifts must be mailed immediately__________ in time for Christmas.

A．in order to have received

B．in order to receive

C．so as to be received

D．so as to be receiving

小张、小王、小刘、小李均是医院综合内科的护士，小张是处理医嘱的主班护士，小王是治疗护士，小李是药疗护士，小刘是生活护理护士。她们每隔一段时间就会由护士长安排进行调换岗位。这种工作方式被称为（）。

A.个案护理

B.功能制护理

C.责任制护理

D.小组护理

E.临床路径