单项选择题
有关肺结核的预防性化学治疗，下列哪项正确()。
- A.与痰菌阳性的患者接触的人群
B.肺结核不能甩化学药物预防
C.接触肺结核的人群都应用药物预防
D.主要用于受结核分枝杆菌感染易发病的高危人群
E.接触肺结核患者，PPD试验阳性的患者
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