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　　B細(xì)??(xi)胞?(bao)作??(zuo)為??(wei)“抗??(kang)體??(ti)工??(gong)廠??(chang)”??，能??(neng)針??(zhen)對(duì)??(dui)不??(bu)同??(tong)病??(bing)原??(yuan)體??(ti)定??(ding)制??(zhi)特??(te)異??(yi)性??(xing)抗??(kang)體??(ti)??，通??(tong)過(guò)??(guo)中??(zhong)和??(he)病??(bing)毒?(du)或??(huo)標(biāo)?(biao)記??(ji)病??(bing)原??(yuan)體??(ti)協(xié)?(xie)助??(zhu)清??(qing)除??(chu)機(jī)??(ji)制??(zhi)；同??(tong)時(shí)??(shi)分?(fen)化??(hua)出??(chu)的??(de)記??(ji)憶??(yi)B細(xì)??(xi)胞??(bao)可??(ke)在??(zai)免??(mian)疫?(yi)結(jié)??(jie)束??(shu)后??(hou)保??(bao)留??(liu)抗??(kang)體??(ti)“圖??(tu)譜?(pu)”??，實(shí)??(shi)現(xiàn)??(xian)快??(kuai)速??(su)二??(er)次??(ci)應(yīng)?(ying)答?(da)??。??　　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(guò)??(guo)敏??(min)、自??(zi)身??(shen)免??(mian)疫??(yi)病??(bing)等??(deng)問(wèn)?(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(guò)??(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)??。。