He can't be from_____ United Kingdom, because he speaks English with ____strong American accent.[ ]

A. /; a

B. the; a

C. the; /

D . /; /

男孩，3岁，发热3天，昏迷2天。体检：呼吸快慢不均，有双吸气，两肺未闻及湿啰音，病理反射阳性，伴有颈抵抗。血气示：PaO₂45mmHg，PaCO₂55mmHg。考虑为（）

A.重症肺炎

B.心力衰竭

C.中枢性呼吸衰竭

D.周围性呼吸衰竭

E.喉炎