It was lucky that little Jack was not at home when the fire broke out；otherwise，he his life．

A．had lost

B．would lose

C．would have lost

D．might lose

患儿男，生后2天，出生体重为2400g。因吸入性肺炎入院，入院时患儿呼吸急促，口唇稍发绀。即置于辐射保暖床上抢救。

该患儿吸氧的流量应选择每分钟为（）

A.1L

B.2L

C.3L

D.4L

E.5L