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學(xué)習(xí)快評(píng)丨qibao666888　　在??(zai)人??(ren)類??(lei)演??(yan)化??(hua)的??(de)長(zhǎng)??(chang)河??(he)中??(zhong)??，人??(ren)體??(ti)免??(mian)疫?(yi)系?(xi)統(tǒng)??(tong)猶?(you)如??(ru)一??(yi)座??(zuo)精??(jing)密??(mi)設(shè)??(she)計(jì)??(ji)的??(de)防?(fang)御??(yu)工??(gong)事??(shi)??，其??(qi)運(yùn)??(yun)作??(zuo)機(jī)??(ji)制??(zhi)既??(ji)展?(zhan)現(xiàn)??(xian)著??(zhe)生??(sheng)命??(ming)演?(yan)化??(hua)的??(de)智??(zhi)慧??(hui)??，也??(ye)蘊(yùn)??(yun)含?(han)著??(zhe)醫(yī)??(yi)學(xué)?(xue)干??(gan)預(yù)??(yu)的??(de)啟??(qi)示??(shi)??。??猶??(you)如??(ru)一??(yi)個(gè)??(ge)“隱??(yin)形??(xing)盾??(dun)牌?(pai)”??，免??(mian)疫??(yi)防??(fang)御??(yu)遵??(zun)從??(cong)怎??(zen)樣??(yang)的??(de)層??(ceng)次??(ci)？??不??(bu)同??(tong)年??(nian)齡??(ling)的??(de)免??(mian)疫??(yi)特??(te)點(diǎn)??(dian)有??(you)哪??(na)些??(xie)？人??(ren)體??(ti)免??(mian)疫??(yi)平??(ping)衡??(heng)的??(de)本??(ben)質(zhì)??(zhi)又??(you)是??(shi)什??(shen)么??(me)？來??(lai)看??(kan)看??(kan)它??(ta)的??(de)運(yùn)??(yun)作??(zuo)奧??(ao)秘??(mi)??。　　嬰??(ying)幼??(you)兒??(er)期??(qi)(0～3歲??(sui))??，新??(xin)生??(sheng)兒??(er)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)像??(xiang)一?(yi)支??(zhi)未??(wei)經(jīng)??(jing)實(shí)??(shi)戰(zhàn)??(zhan)的??(de)“新?(xin)兵??(bing)部??(bu)隊(duì)??(dui)”??，先??(xian)天??(tian)性??(xing)免??(mian)疫??(yi)(如?(ru)中??(zhong)性??(xing)粒??(li)細(xì)??(xi)胞??(bao)、巨??(ju)噬??(shi)細(xì)??(xi)胞??(bao))活??(huo)性??(xing)高?(gao)??，但??(dan)皮??(pi)膚?(fu)、黏??(nian)膜??(mo)屏??(ping)障??(zhang)薄??(bo)弱??(ruo)??，易??(yi)受??(shou)病??(bing)毒??(du)(如??(ru)呼??(hu)吸??(xi)道??(dao)合?(he)胞??(bao)病??(bing)毒??(du)、輪?(lun)狀??(zhuang)病??(bing)毒??(du))侵??(qin)襲?(xi)??。?此??(ci)時(shí)??(shi)主?(zhu)要??(yao)依??(yi)賴??(lai)母??(mu)體?(ti)通??(tong)過??(guo)胎??(tai)盤??(pan)和?(he)母??(mu)乳??(ru)傳??(chuan)遞??(di)的??(de)抗??(kang)體??(ti)(如?(ru)IgG、IgA)提??(ti)供??(gong)保??(bao)護(hù)??(hu)??。。