腹痛泄泻,每因抑郁,恼怒或情绪紧张时诱发或加重,多伴有胸胁胀闷,嗳气食少,舌淡红,脉弦。治当()
A.调和脾胃
B.疏肝和胃
C.抑肝扶脾
D.解郁疏肝
E.泄肝除湿
参考答案:C
— Do you pay a visit to your grandparents in the countryside________?
— No. only once in a while.[ ]
A. completely
B. frequently
C. separately
D. probably
线材拉伸的基本原理是什么?