锁骨上神经阻滞最常见的并发症是（）
A.膈神经麻痹
B.椎动脉内注射
C.脊髓阻滞
D.喉返神经阻滞
E.气胸
参考答案：E
—Linda, I am very thirsty.
—Let's go to the nearest supermarket _____ some drink. OK? [ ]
A. buy
B. bought
C. to buy
D. buying
治疗恶性贫血时，宜选用（）
A.口服维生素B12
B.肌注维生素B12
C.口服硫磺酸亚铁
D.肌注右旋糖酐铁
E.肌注叶酸
