单项选择题

重度营养不良患儿调整饮食,开始供给热量应为()

A.20~30kcal/(kg·d)
B.40~60kcal/(kg·d)
C.80~100kcal/(kg·d)
D.120~140kcal/(kg·d)
E.>140kcal/(kg·d)