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　　第??(di)一??(yi)道??(dao)防??(fang)御??(yu)是??(shi)物??(wu)理??(li)屏??(ping)障??(zhang)??，比??(bi)如??(ru)皮??(pi)膚??(fu)和??(he)黏?(nian)膜??(mo)??，像??(xiang)城?(cheng)墻??(qiang)一??(yi)樣??(yang)覆??(fu)蓋??(gai)體??(ti)表??(biao)??，通??(tong)過??(guo)汗??(han)液??(ye)、皮??(pi)脂??(zhi)和??(he)黏??(nian)液??(ye)中??(zhong)的??(de)抗?(kang)菌??(jun)成??(cheng)分??(fen)??，直??(zhi)接??(jie)阻??(zu)擋?(dang)細(xì)??(xi)菌??(jun)、病??(bing)毒??(du)入??(ru)侵??(qin)；比??(bi)如??(ru)呼??(hu)吸??(xi)道??(dao)纖??(xian)毛?(mao)??，如??(ru)同??(tong)護(hù)??(hu)城??(cheng)河??(he)的??(de)“清??(qing)道??(dao)夫??(fu)”??，通??(tong)過?(guo)擺??(bai)動(dòng)??(dong)??，將??(jiang)灰??(hui)塵??(chen)和??(he)病??(bing)原??(yuan)體??(ti)排?(pai)出??(chu)體??(ti)外??(wai)??。?　　真??(zhen)正??(zheng)的?(de)健??(jian)康??(kang)之??(zhi)道??(dao)??，是??(shi)尊??(zun)重??(zhong)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的?(de)自??(zi)然??(ran)規(guī)??(gui)律??(lv)——通??(tong)過??(guo)科?(ke)學(xué)??(xue)防??(fang)護(hù)??(hu)、自??(zi)律??(lv)生??(sheng)活??(huo)和??(he)定??(ding)期??(qi)監(jiān)?(jian)測(cè)??(ce)??，讓?(rang)免??(mian)疫??(yi)力??(li)在?(zai)“攻??(gong)守??(shou)兼?(jian)備??(bei)”中??(zhong)穩(wěn)??(wen)定??(ding)運(yùn)?(yun)行??(xing)??。??正?(zheng)如??(ru)中??(zhong)醫(yī)??(yi)所??(suo)言??(yan)：“正??(zheng)氣??(qi)存??(cun)內(nèi)??(nei)??，邪?(xie)不??(bu)可??(ke)干??(gan)”??，這??(zhe)里??(li)的??(de)“正??(zheng)氣??(qi)”并??(bing)非?(fei)越??(yue)強(qiáng)??(qiang)越??(yue)好??(hao)??，而??(er)是?(shi)“亢?(kang)則??(ze)害??(hai)??，承?(cheng)乃??(nai)制??(zhi)”??，需??(xu)要??(yao)維??(wei)持?(chi)身??(shen)體??(ti)陰??(yin)陽??(yang)調(diào)??(tiao)和?(he)、氣??(qi)血?(xue)通??(tong)暢??(chang)的??(de)平??(ping)衡??(heng)狀??(zhuang)態(tài)??(tai)??。唯??(wei)有??(you)如??(ru)此??(ci)??，免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)才??(cai)能??(neng)真??(zhen)正??(zheng)成??(cheng)為??(wei)守??(shou)護(hù)??(hu)健?(jian)康?(kang)的??(de)“隱??(yin)形??(xing)盾??(dun)牌??(pai)”??。。