—The trip shouldn’t take more than an hour.

—_______.it is at least two hours.

A．I guess so

B．That’s it

C．You must be joking

D．It depends

新生儿，日龄20天，生后即有腹泻，为黄绿色稀便，每天3～4次，无黏液，无臭味。患儿身长及体重增长正常。该患儿最可能的诊断是()

A．鼠伤寒性肠炎

B．金黄色葡萄球菌性肠炎

C．致病性大肠杆菌性肠炎

D．病毒性肠炎

E．生理性腹泻