單項選擇題患兒男,1歲。腹瀉3天,每日大便7~8次,黃色稀便,無發(fā)熱及嘔吐,尿量稍減少。查體:體重9kg,哭有淚,皮膚彈性尚可,口唇黏膜略干燥。醫(yī)師給予口服補液鹽補充其累積損失量,正確的液量選擇是()

A.250~450ml
B.450~720ml
C.750~920ml
D.950~1020ml
E.1050~1320ml