I have experienced quite a number of cases ______ I really wanted to help but could not have anything to ______.

A．when; put on my hands

B．that; put my hands on

C．where; put my hands on

D．in that; put on my hands

胃中寒冷之呃逆的病机为

A．脾虚胃寒，失于温养
B．脾虚失运，清浊不分
C．寒蓄中焦，气机不利，胃气上逆
D．中阳不足，胃失和降，虚气上逆
E．脾胃虚寒，失于温煦，运化失职