张大夫:我平常比较爱喝茶,知道茶有凝神的作用,能消除疲劳,促进新陈代谢,并有维持心脏、血管等正常机能的作用。最近我又听说用茶水漱口也有很多好处,但具体都能起什么作用,我就说不清楚了,您能给我讲讲吗?因为我觉得老年人养生,要知其然也要知其所以然。您说对吗? Dr. Zhang: I usually love to drink tea. I know that tea has a refreshing effect and can eliminate fatigue, promote metabolism, and maintain the normal function of the heart and blood vessels. Recently, I also heard that there are many benefits to gargle with tea, but what are the specific effects? I can not tell you clearly. Could you tell me about it? Because I think elderly people should know about their health Its natural. Are you right?