"Must I return the book this morning?" "

No, you _____. But you _____ to return it before next Monday." [ ]

A. needn't, must

B. mustn't, can

C. mustn't, may

D. needn't, need

胎龄40周的足月儿，剖宫产，出生体重2750g。生后不久出现皮疹。母亲产前检查

如诊断为先天性梅毒，应采取的治疗措施包括（提示宫内感染。患儿胸部X线片：双肺纹理增粗。）()

A.第3代头孢菌素

B.青霉素

C.丁胺卡那霉素

D.对症治疗

E.保肝治疗

F.机械通气