----What is your new Chinese teacher like, Mary?

---Oh, ____________________________.

A．we’re getting along quite well with him

B．he likes playing football better than anything else

C．he has strange ways to make his classes lively and interesting

D．he is a handsome young man in his early thirties

患者，女性，34岁，胸部锐器伤后半小时，出现呼吸困难，伴烦躁，出冷汗入急诊。查体：脉搏102次/分，血压85/55mmHg，口唇发绀，气管左移。右侧胸部的中部有一伤口，随呼吸有"嘶嘶"声，右胸叩诊鼓音，呼吸音消失。拟行清创术及闭式胸膜腔引流术。

急诊护士应首先采取的急救措施是（）

A.开通静脉通路

B.封闭胸部伤口

C.用敷料覆盖

D.镇静、止痛

E.胸腔穿刺抽气