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　　免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)發(fā)??(fa)育??(yu)如??(ru)同??(tong)建??(jian)造?(zao)一??(yi)座??(zuo)城?(cheng)堡??(bao)?，需?(xu)要??(yao)從??(cong)地??(di)基??(ji)開??(kai)始??(shi)逐??(zhu)步??(bu)完??(wan)善?(shan)??。??　　成??(cheng)年??(nian)期??(qi)是??(shi)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)“黃??(huang)金??(jin)時??(shi)代??(dai)”??，功??(gong)能??(neng)趨??(qu)于?(yu)穩(wěn)??(wen)定?(ding)??，但??(dan)不??(bu)良??(liang)生??(sheng)活??(huo)習??(xi)慣??(guan)可??(ke)能??(neng)引??(yin)發(fā)??(fa)“隱??(yin)形??(xing)危??(wei)機??(ji)”??。??這??(zhe)一??(yi)時??(shi)期??(qi)的??(de)免??(mian)疫??(yi)特??(te)點??(dian)主??(zhu)要??(yao)是?(shi)兩??(liang)個??(ge)方??(fang)面??(mian)??，一??(yi)是??(shi)胸??(xiong)腺?(xian)萎??(wei)縮??(suo)??，新??(xin)生??(sheng)T細??(xi)胞??(bao)減??(jian)少??(shao)??，依??(yi)賴??(lai)記??(ji)憶??(yi)T細??(xi)胞??(bao)應??(ying)對??(dui)病??(bing)原??(yuan)體??(ti)；二??(er)是??(shi)慢??(man)性??(xing)炎?(yan)癥??(zheng)??，吸??(xi)煙??(yan)、肥??(fei)胖??(pang)、壓?(ya)力??(li)等??(deng)導??(dao)致??(zhi)低??(di)度??(du)炎??(yan)癥??(zheng)??，增??(zeng)加??(jia)糖??(tang)尿?(niao)病??(bing)、心??(xin)血??(xue)管??(guan)疾?(ji)病??(bing)風??(feng)險?(xian)??。。