男，45岁，有肺结核史，近1个月来咳嗽、低热，痰中带血，胸片示：左肺上叶不张。

下列哪项因素对预后影响最大（）

A.肿物巨大

B.中央型肺癌

C.癌肿的组织学类型及分化程度

D.术前已有肺不张

E.出现骨关节综合征

Two family members are arguing in a child’s room. They start to hit each other and the child is crying. What’s the most appropriate nursing action（）

A. Call security to come and intervene.

B. Remove the child from the room.

C. Ask one of the family members to leave the room.

D. Try to reason with both family members.