过敏性紫癜 逆向辨证 血热妄行证 湿热阻络证 脾不统血证 阴虚火旺证 脾肾阳虚证 刘爱民 allergic purpura reverse syndrome differentiation syndrome of heat enabling frenetic movement of blood syndrome of damp-ness-heat blocking collaterals syndrome of spleen failure to control blood syndrome of yin deficiency with effulgent fire syndrome