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　　第??(di)二??(er)道??(dao)防??(fang)御?(yu)是??(shi)“清??(qing)道?(dao)夫??(fu)軍?(jun)團(tuán)祝(tuan)”?，負(fù)??(fu)責(zé)??(ze)吞??(tun)噬?(shi)與??(yu)清??(qing)掃??(sao)??。??中??(zhong)性??(xing)粒??(li)細(xì)??(xi)胞??(bao)24小??(xiao)時(shí)??(shi)在??(zai)血??(xue)液??(ye)中??(zhong)“巡??(xun)邏??(luo)”?，一??(yi)旦??(dan)發(fā)??(fa)現(xiàn)??(xian)病??(bing)原??(yuan)體??(ti)?，立??(li)刻??(ke)沖??(chong)鋒??(feng)吞??(tun)噬??(shi)??。巨??(ju)噬?(shi)細(xì)??(xi)胞??(bao)如??(ru)同??(tong)“清??(qing)障??(zhang)車??(che)”?，負(fù)??(fu)責(zé)??(ze)吞?(tun)噬??(shi)病??(bing)原?(yuan)體??(ti)并??(bing)發(fā)??(fa)出?(chu)警?(jing)報(bào)??(bao)信??(xin)號(hào)??(hao)?，召?(zhao)集??(ji)其??(qi)他??(ta)免??(mian)疫??(yi)細(xì)??(xi)胞??(bao)參??(can)戰(zhàn)??(zhan)???！　∶??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)智??(zhi)慧??(hui)??，不??(bu)在??(zai)于??(yu)“消??(xiao)滅??(mie)一??(yi)切??(qie)”??，而??(er)在??(zai)于??(yu)“辨?(bian)明??(ming)敵??(di)我??(wo)”??，維??(wei)持??(chi)“動(dòng)??(dong)態(tài)??(tai)平??(ping)衡??(heng)”??。??它??(ta)像?(xiang)一??(yi)位??(wei)經(jīng)??(jing)驗(yàn)??(yan)豐??(feng)富?(fu)的??(de)指??(zhi)揮??(hui)官??(guan)??，既??(ji)能??(neng)調(diào)??(tiao)動(dòng)??(dong)兵??(bing)力??(li)快??(kuai)速??(su)殲??(jian)敵??(di)??，又??(you)能??(neng)及??(ji)時(shí)??(shi)收??(shou)兵??(bing)避??(bi)免?(mian)誤??(wu)傷??(shang)??。盲??(mang)目??(mu)追??(zhui)求?(qiu)“增??(zeng)強(qiáng)??(qiang)免??(mian)疫??(yi)力??(li)”??，只??(zhi)注??(zhu)重??(zhong)免??(mian)疫??(yi)防??(fang)御??(yu)??，忽??(hu)略??(lve)免??(mian)疫?(yi)監(jiān)??(jian)視??(shi)與??(yu)免??(mian)疫??(yi)自??(zi)穩(wěn)??(wen)??，失??(shi)去??(qu)對?(dui)免?(mian)疫??(yi)防??(fang)御??(yu)的??(de)調(diào)??(tiao)控??(kong)??，反??(fan)而??(er)會(huì)??(hui)打?(da)破??(po)這??(zhe)種?(zhong)微??(wei)妙??(miao)的?(de)平??(ping)衡?(heng)??。人??(ren)體??(ti)免??(mian)疫?(yi)系??(xi)統(tǒng)??(tong)的??(de)偉??(wei)大??(da)??，就??(jiu)在??(zai)于??(yu)懂??(dong)得?(de)何??(he)時(shí)?(shi)進(jìn)??(jin)攻??(gong)??，何??(he)時(shí)?(shi)休??(xiu)戰(zhàn)??(zhan)??。。