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　　人??(ren)體??(ti)由??(you)兩??(liang)支??(zhi)精?(jing)銳?(rui)部??(bu)隊(duì)??(dui)——先??(xian)天??(tian)性??(xing)免??(mian)疫??(yi)和??(he)適??(shi)應(yīng)?(ying)性??(xing)免??(mian)疫??(yi)組??(zu)成??(cheng)??。??它??(ta)們?(men)分??(fen)工??(gong)明??(ming)確??(que)、協(xié)??(xie)同?(tong)作??(zuo)戰(zhàn)??(zhan)??，既??(ji)能?(neng)抵??(di)御??(yu)外??(wai)敵??(di)入??(ru)侵??(qin)??，又??(you)能??(neng)清?(qing)理??(li)內(nèi)??(nei)部??(bu)隱??(yin)患??(huan)??。　　其??(qi)次?(ci)是??(shi)清??(qing)除??(chu)威?(wei)脅?(xie)??，包??(bao)括?(kuo)消??(xiao)滅??(mie)細(xì)??(xi)菌??(jun)、病??(bing)毒??(du)等??(deng)外??(wai)來??(lai)入??(ru)侵??(qin)者??(zhe)??，及??(ji)時(shí)??(shi)發(fā)??(fa)現(xiàn)??(xian)并??(bing)清??(qing)除??(chu)異??(yi)常??(chang)細(xì)??(xi)胞??(bao)??，防??(fang)止??(zhi)腫??(zhong)瘤??(liu)形??(xing)成??(cheng)??。??。