答案：A
某患儿因主诉"经常性腹胀、腹痛、腹泻"而入院治疗，父母反映上述症状一般出现于喝鲜牛奶以后，最后诊断为"乳糖不耐受"。
有助于确诊的检测方法是（）
A.腹部触诊
B.腹部X线片
C.乳糖氢气呼气试验
D.无乳糖试验饮食
E.粪常规
Man: Have you any idea what Jack Johnson's doing these daysWoman: Do you know, I've lost track of him.Question: What does the woman mean
A．She has no idea where Jack is.
B．She last saw Jack at the race track.
C．She's been trying to track Jack.
D．Jack was lately seen driving a truck.
