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學習快評丨qibao666888　　總??(zong)的??(de)來??(lai)說??(shuo)??，先??(xian)天??(tian)性??(xing)免??(mian)疫??(yi)的??(de)特??(te)點??(dian)是??(shi)反??(fan)應??(ying)快??(kuai)、無??(wu)差??(cha)別?(bie)攻??(gong)擊??(ji)??，但?(dan)缺??(que)乏??(fa)“記??(ji)憶??(yi)功??(gong)能??(neng)”??，無??(wu)法??(fa)針??(zhen)對??(dui)特??(te)定??(ding)敵??(di)人??(ren)提??(ti)升??(sheng)戰(zhàn)??(zhan)斗??(dou)力??(li)??。??　　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??(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)??。。