China has been pushing the reform of public hospitals ________ all its citizens.[ ]

A. in charge of  

B. for the purpose of

C. in honor of  

D. for the benefit of

选前脱泥可以使（）。

A.简化分流环节

B.改善细颗粒煤的分选效果

C.增加了介质参数控制的复杂性和难度

D.降低了介质参数控制的复杂性和难度