治疗贫血的关键()
A.去除病因
B.加强护理、预防感染、注意饮食质量和搭配
C.针对病因选择有效的药物治疗
D.输血疗法
E.治疗并发症
参考答案:A
我国著名的人口地理分界线是从________到__________。
I really enjoyed your speech, ______ there were some parts I didn't quite understand. [ ]
A. because
B. unless
C. though
D. after