As is known, it was Hu Jintao, _____ president of our nation, who gave _____ lecture at the ceremony

of National Day[ ]

A. the; a

B. the ; /

C. a; the

D. /; a

1岁半小儿，其父患浸润型肺结核，有咯血，小儿与父母同住，无任何症状，X线片未见异常，结核菌素试验阳性，应采取的措施是

A．立即给小儿接种卡介苗

B．隔离小儿，继续观察

C．口服异烟肼，疗程6个月

D．口服异烟肼+肌内注射链霉素，疗程1年

E．不必给小儿服药，定期复查X线胸片，发现病灶再行抗结核治疗