慢性肺源性心脏病急性加重期的治疗措施,下列哪项不是关键性的()。
A.积极控制感染
B.通畅呼吸道
C.氧疗
D.利尿,强心
E.使用激素和细胞活性药物
参考答案:E
It's so cold and you've walked a long way. You _______ be tired. Have a rest. please. [ ]
A. can't
B. might
C. must
D. can