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學(xué)習(xí)快評丨qibao666888　　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?(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??(hu)城??(cheng)河??(he)的?(de)“清??(qing)道??(dao)夫??(fu)”??，通??(tong)過??(guo)擺??(bai)動??(dong)??，將??(jiang)灰??(hui)塵??(chen)和??(he)病??(bing)原??(yuan)體??(ti)排??(pai)出??(chu)體??(ti)外??(wai)??。??　　老?(lao)年??(nian)期??(qi)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)如??(ru)同??(tong)“老??(lao)兵??(bing)”??，經(jīng)??(jing)驗??(yan)豐??(feng)富??(fu)但??(dan)機??(ji)能??(neng)衰??(shuai)退??(tui)??，需??(xu)針??(zhen)對??(dui)性??(xing)維??(wei)護??(hu)以??(yi)降??(jiang)低??(di)重??(zhong)癥??(zheng)風(fēng)?(feng)險??(xian)??。??這??(zhe)一??(yi)時??(shi)期??(qi)的??(de)免??(mian)疫??(yi)特??(te)點??(dian)??，一??(yi)是??(shi)T細??(xi)胞??(bao)功??(gong)能??(neng)退??(tui)化??(hua)??，記??(ji)憶??(yi)T細??(xi)胞??(bao)主??(zhu)導(dǎo)??(dao)??，但?(dan)清??(qing)除?(chu)病??(bing)原??(yuan)體??(ti)能??(neng)力??(li)下??(xia)降??(jiang)；二?(er)是??(shi)抗??(kang)體??(ti)質(zhì)??(zhi)量??(liang)降?(jiang)低??(di)??，疫??(yi)苗??(miao)應(yīng)??(ying)答?(da)減?(jian)弱?(ruo)??，感??(gan)染??(ran)(如??(ru)肺??(fei)炎?(yan)、帶?(dai)狀??(zhuang)皰??(pao)疹??(zhen))易??(yi)重?(zhong)癥?(zheng)化??(hua)；三??(san)是??(shi)衰?(shuai)老??(lao)相?(xiang)關(guān)??(guan)疾??(ji)病??(bing)發(fā)??(fa)病??(bing)風(fēng)??(feng)險??(xian)上??(shang)升??(sheng)：免??(mian)疫?(yi)監(jiān)??(jian)視??(shi)功??(gong)能?(neng)減??(jian)弱??(ruo)??，無??(wu)法??(fa)及??(ji)時??(shi)清??(qing)除??(chu)突??(tu)變??(bian)細??(xi)胞??(bao)??。。