男性，10岁，头面部、四肢及会阴部火焰烧伤4小时，烧伤总面积50%，深Ⅱ度20%，Ⅲ度30%，烦躁不安，手足湿冷，心率160次／分，呼吸25次／分，伤后无尿。

首选的诊断是（）

A.火焰烧伤

B.急性肾功能衰竭

C.呼吸道吸入性损伤

D.大面积特重度烧伤

E.轻度烧伤

An appropriate-for-gestational-age neonate should weigh（）

A. between the 10th and the 90th percentiles for age.

B. at least 2,500 g (5 lb, 8 oz).

C. between 2,000 and 4,000 g (4 lb, 6 oz and 8 lb, 12 oz).

D. in the 50th percentile.