吴威是龚贺从小到大的朋友，也是一名导游。龚贺出事前一天，他正在青海带团，还跟龚贺说自己有高原反应。龚贺分析说，“你三年半不出团，身体免疫力下降了吧。”

dantongqi，beijingquanshixiaoxuezhaoshengrenshubishangnianxiaofuzengjia。jinguanxiaoxuezhaoshengrenshuxiangduiwending，danchushengrenkoujianshaodaqushixia，youeryuanzhaoshengnanxianxiangyijingkaishichuxian，binghuizhujiankuodahemanyan。chuandaodaojinianhou，ruxuerenshuxiajiang，yeshidagailvshijian。但(dan)同(tong)期(qi)，(，)北(bei)京(jing)全(quan)市(shi)小(xiao)学(xue)招(zhao)生(sheng)人(ren)数(shu)比(bi)上(shang)年(nian)小(xiao)幅(fu)增(zeng)加(jia)。(。)尽(jin)管(guan)小(xiao)学(xue)招(zhao)生(sheng)人(ren)数(shu)相(xiang)对(dui)稳(wen)定(ding)，(，)但(dan)出(chu)生(sheng)人(ren)口(kou)减(jian)少(shao)大(da)趋(qu)势(shi)下(xia)，(，)幼(you)儿(er)园(yuan)招(zhao)生(sheng)难(nan)现(xian)象(xiang)已(yi)经(jing)开(kai)始(shi)出(chu)现(xian)，(，)并(bing)会(hui)逐(zhu)渐(jian)扩(kuo)大(da)和(he)蔓(man)延(yan)。(。)传(chuan)导(dao)到(dao)几(ji)年(nian)后(hou)，(，)入(ru)学(xue)人(ren)数(shu)下(xia)降(jiang)，(，)也(ye)是(shi)大(da)概(gai)率(lv)事(shi)件(jian)。(。)