One hundred and twenty-four patients of abdominal operation at selective time were randomized into a routine drug anesthesia group ( group A , @ cases ) , a meridian point @ Hz group ( group B , @ cases ) , a me ridian point @ Hz/@ Hz group ( group C , @ cases ) , a meridian point @ Hz group ( group D , @ cases ) and a transcutaneous acupoint electric stimulation @ Hz/@ Hz group ( group E , @ cases ) .