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原標(biāo)題：无码视频一区二区三区

學(xué)習(xí)快評丨qibao666888　　許??(xu)多??(duo)人??(ren)誤??(wu)以?(yi)為??(wei)“免??(mian)疫??(yi)力??(li)越??(yue)強(qiáng)??(qiang)越??(yue)好??(hao)”??，盲??(mang)目??(mu)服??(fu)用??(yong)補(bǔ)??(bu)品??(pin)、濫??(lan)用??(yong)保??(bao)健?(jian)品??(pin)??，結(jié)?(jie)果??(guo)反??(fan)而?(er)引??(yin)發(fā)??(fa)過??(guo)敏??(min)、自??(zi)身??(shen)免??(mian)疫??(yi)病??(bing)等??(deng)問??(wen)題??(ti)??。??事??(shi)實(shí)??(shi)上??(shang)??，免?(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)精??(jing)髓?(sui)在??(zai)于??(yu)“動(dòng)??(dong)態(tài)??(tai)平??(ping)衡?(heng)”——既??(ji)能??(neng)高??(gao)效??(xiao)防??(fang)御??(yu)??，又??(you)不??(bu)失??(shi)控??(kong)攻??(gong)擊??(ji)自??(zi)身??(shen)??。這??(zhe)種??(zhong)平?(ping)衡??(heng)一??(yi)旦??(dan)被??(bei)打??(da)破??(po)??，就??(jiu)像??(xiang)過??(guo)度??(du)緊?(jin)繃??(beng)的??(de)琴??(qin)弦??(xian)??，稍?(shao)有??(you)不??(bu)慎??(shen)便??(bian)會(huì)??(hui)走??(zou)音??(yin)或??(huo)斷??(duan)弦??(xian)??。　　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)??。。