By midnight the floor was wet with beer. One young technician slipped and bumped into another. They struggled, ________ trying to get the other in a head-lock.

A．every

B．all

C．everyone

D．each

病人王某，男，60岁，因腿部外伤入院一周。所在病室靠近一个建筑工地，昼夜机器轰鸣。病人主诉眩晕、恶心、失眠。

该病人出现以上症状可能是因为（）。

A.室内温度过高

B.室内空气污浊

C.长期噪音影响

D.室内采光不佳

E.室内湿度过低