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學習快評丨qibao666888　　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??(shi)戰(zhàn)??(zhan)的??(de)“新??(xin)兵??(bing)部??(bu)隊??(dui)”??，先??(xian)天??(tian)性??(xing)免??(mian)疫??(yi)(如??(ru)中??(zhong)性??(xing)粒??(li)細??(xi)胞??(bao)、巨??(ju)噬??(shi)細??(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??(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?(hu)???！　細??(xi)胞??(bao)的??(de)角??(jiao)色??(se)則??(ze)是??(shi)指??(zhi)揮?(hui)、“殺??(sha)敵??(di)”與??(yu)“維??(wei)穩(wěn)??(wen)”?。?比??(bi)如??(ru)輔??(fu)助??(zhu)T細??(xi)胞??(bao)??，扮?(ban)演??(yan)著??(zhe)“指??(zhi)揮?(hui)官??(guan)”角??(jiao)色??(se)??，通??(tong)過??(guo)釋??(shi)放??(fang)細??(xi)胞??(bao)因??(yin)子?(zi)??，激??(ji)活秘(huo)B細??(xi)胞??(bao)和?(he)其??(qi)他??(ta)免??(mian)疫??(yi)細??(xi)胞?(bao)；細??(xi)胞??(bao)毒??(du)性?(xing)T細?(xi)胞??(bao)??，扮??(ban)演??(yan)著??(zhe)“殺??(sha)手??(shou)”角??(jiao)色??(se)??，直??(zhi)接??(jie)穿??(chuan)透??(tou)感?(gan)染??(ran)細??(xi)胞??(bao)??，注?(zhu)入??(ru)毒??(du)素??(su)將??(jiang)其??(qi)摧??(cui)毀??(hui)；調(diào)??(tiao)節(jié)?(jie)T細??(xi)胞??(bao)??，扮??(ban)演??(yan)著??(zhe)“維??(wei)穩(wěn)??(wen)員??(yuan)”角??(jiao)色??(se)??，防??(fang)止??(zhi)免??(mian)疫??(yi)反??(fan)應?(ying)過??(guo)度?(du)??，避??(bi)免?(mian)誤??(wu)傷??(shang)健??(jian)康??(kang)組?(zu)織??(zhi)?。。