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　　成??(cheng)年??(nian)期??(qi)是?(shi)免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)“黃??(huang)金??(jin)時(shí)??(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(xí)??(xi)慣?(guan)可??(ke)能?(neng)引??(yin)發(fā)??(fa)“隱??(yin)形??(xing)危?(wei)機(jī)??(ji)”??。??這??(zhe)一??(yi)時(shí)??(shi)期??(qi)的??(de)免?(mian)疫??(yi)特??(te)點(diǎn)??(dian)主??(zhu)要?(yao)是??(shi)兩??(liang)個(gè)??(ge)方??(fang)面?(mian)??，一?(yi)是??(shi)胸??(xiong)腺??(xian)萎??(wei)縮??(suo)??，新??(xin)生??(sheng)T細(xì)??(xi)胞??(bao)減??(jian)少??(shao)??，依??(yi)賴?(lai)記??(ji)憶??(yi)T細(xì)??(xi)胞??(bao)應(yīng)??(ying)對(duì)??(dui)病??(bing)原??(yuan)體??(ti)；二??(er)是??(shi)慢??(man)性?(xing)炎?(yan)癥??(zheng)??，吸??(xi)煙??(yan)、肥秘(fei)胖??(pang)、壓??(ya)力??(li)等??(deng)導(dǎo)??(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(fēng)??(feng)險(xiǎn)??(xian)??。。