游览前半程的一个小时里，龚贺像往常一样，耐心地向所有人做讲解，他尽量选择在阴凉处，避免太阳照射。但是到了后半程，他的话明显变少了。

anzhaoguojiashuilibuguanwangdejieshi：“liyongdifanghehedaoxiehong，yunyongshuikulanxuhongshui，ruguorengbunenggoukongzhihongshui，zaishishiqiyongxuzhihongqu，yifenxuchaoehongshui，xuejianhongfeng，zuidachengdudijianqinghongshuizaihaizongtisunshi。”按(an)照(zhao)国(guo)家(jia)水(shui)利(li)部(bu)官(guan)网(wang)的(de)解(jie)释(shi)：(：)“(“)利(li)用(yong)堤(di)防(fang)和(he)河(he)道(dao)泄(xie)洪(hong)，(，)运(yun)用(yong)水(shui)库(ku)拦(lan)蓄(xu)洪(hong)水(shui)，(，)如(ru)果(guo)仍(reng)不(bu)能(neng)够(gou)控(kong)制(zhi)洪(hong)水(shui)，(，)再(zai)适(shi)时(shi)启(qi)用(yong)蓄(xu)滞(zhi)洪(hong)区(qu)，(，)以(yi)分(fen)蓄(xu)超(chao)额(e)洪(hong)水(shui)，(，)削(xue)减(jian)洪(hong)峰(feng)，(，)最(zui)大(da)程(cheng)度(du)地(di)减(jian)轻(qing)洪(hong)水(shui)灾(zai)害(hai)总(zong)体(ti)损(sun)失(shi)。(。)”(”)