www.lindalemus.com/yishi/阳极自天而降．是行阴道．乃西方之气．膏粱之物．下泄是也．极则阴道不行．反闭于故不得小便．是天之气不得下通也．逆而上行．反行阳道．故血脉凝滞而不通．则人www.lindalemus.com/shouyi/迎之脉大四倍于气口．此浊气反行清道也．故曰关．