The operation room in every hospital has to _______bacteria of any kind so that the patient being

operated on doesn't get infected.    [ ]

A. keep free from  

B. make it free from  

C. to be made free with  

D. be kept free from

下列哪项属于精神科危机干预的范围（）.

A.木僵状态

B.知觉妄想

C.自杀、自伤、伤人、毁物

D.情感淡漠

E.意志减退