He always did well at school _____ having to do part–time jobs every now and then.

A．in spite of

B．instead of

C．in case of

D．in favor of

足月新生儿，因胎心率＞160次/分，产钳分娩，第二产程延长，Apgar评分3分，出生时全身皮肤苍白，呼吸微弱，心率30次/分，肌张力松弛，首先应采取的紧急措施是

A．供给氧气
B．清除气道分泌物
C．刺激呼吸
D．人工呼吸，心脏按摩
E．纠正酸中毒