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　　60歲??(sui)以??(yi)上??(shang)??，延??(yan)緩??(huan)衰?(shuai)退??(tui)??，守??(shou)護(hù)??(hu)免??(mian)疫??(yi)防??(fang)線??(xian)??。??　　T細(xì)??(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(xì)??(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(xì)??(xi)胞?(bao)因??(yin)子??(zi)??，激??(ji)活??(huo)B細(xì)??(xi)胞??(bao)和??(he)其??(qi)他??(ta)免?(mian)疫??(yi)細(xì)?(xi)胞??(bao)；細(xì)??(xi)胞??(bao)毒?(du)性??(xing)T細(xì)??(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(xì)??(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(xì)??(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(yīng)??(ying)過??(guo)度?(du)??，避??(bi)免??(mian)誤??(wu)傷??(shang)健??(jian)康??(kang)組??(zu)織?(zhi)??。。