You _____ pay too much attention to your reading skill, as it is so important. [ ]

A. can't

B. should

C. must

D. needn't

短暂性脑缺血发作应用阿司匹林治疗的目的是

A．改善神经功能的缺失

B．保护脑细胞

C．增加再灌注

D．预防复发

E．扩张血管