单项选择题

A.首剂量0.3~0.5mg/kg追加剂量5~10mg/h
B.首剂量0.5~1.0mg/kg追加剂量5~10mg/h
C.首剂量0.3~0.5mg/kg追加剂量10~20mg/h
D.首剂量0.5~1.0mg/kg追加剂量10~20mg/h