玉米很少被当饭吃，怎么就成了世界三大粮食作物之一？|精品久久久久久国产

###yayinzhongtongdechengyinyuyufangyayinzhongtongshixuduorenzairichangshenghuozhongchangyudaodewenti，tabujinyingxiangwomendeyinshiheshuohua，haikenengshigengyanzhongkouqiangjibingdeqianzhao。lejieyayinzhongtongdechengyin、zhengzhuangjiyufangcuoshi，youzhuyujishichulihebimianjinyibudekouqiangjiankangwenti。####yi、yayinzhongtongdechengyinyayinzhongtongdechengyinduozhongduoyang，qizhongzuichangjiandeyuanyinshiyazhoubing。yazhoubingtongchangyoukouqiangneixijunganranyinqi，daozhiyayinfayan，congerchuxianhongzhong、chuxuedengzhengzhuang。ciwai，buliangdekouqiangweishengxiguan，rubuguilvshuaya、quefayaxianshiyong，yehuishiyajunbanjiju，jinyibujiazhongyanzheng。lingyizhongchangjiandeyuanyinshiyayinwaishang，liruyaoyingwu、shuayaguoyuyonglihuoshiyongbushihedeyashua，zhexiedoukenengdaozhiyayinsunshang，jineryinfazhongtong。ciwai，yixiequanshenxingjibing，rutangniaobing、mianyixitongjibingdeng，yekenengyingxiangyayinjiankang，shiqigengrongyifashengzhongtong。####er、yayinzhongtongdezhengzhuangyayinzhongtongdezhuyaozhengzhuangbaokuoyayinhongzhong、yatong、chuxue，shenzhizaijinshishigandaotengtong。youshihuanzhehaikenengbansuikouchou、yachisongdongdengzhengzhuang。fashengyayinzhongtonghou，jishiquyakezhensuojiuyishifeichangzhongyaode，yiquedingjutibingyinbingjinxingxiangyingzhiliao。####san、yayinzhongtongdeyufang1.**baochilianghaodekouqiangweisheng**：#(#)#(#)#(#)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)成(cheng)因(yin)与(yu)预(yu)防(fang)牙(ya)龈(yin)肿(zhong)痛(tong)是(shi)许(xu)多(duo)人(ren)在(zai)日(ri)常(chang)生(sheng)活(huo)中(zhong)常(chang)遇(yu)到(dao)的(de)问(wen)题(ti)，(，)它(ta)不(bu)仅(jin)影(ying)响(xiang)我(wo)们(men)的(de)饮(yin)食(shi)和(he)说(shuo)话(hua)，(，)还(hai)可(ke)能(neng)是(shi)更(geng)严(yan)重(zhong)口(kou)腔(qiang)疾(ji)病(bing)的(de)前(qian)兆(zhao)。(。)了(le)解(jie)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)成(cheng)因(yin)、(、)症(zheng)状(zhuang)及(ji)预(yu)防(fang)措(cuo)施(shi)，(，)有(you)助(zhu)于(yu)及(ji)时(shi)处(chu)理(li)和(he)避(bi)免(mian)进(jin)一(yi)步(bu)的(de)口(kou)腔(qiang)健(jian)康(kang)问(wen)题(ti)。(。)#(#)#(#)#(#)#(#)一(yi)、(、)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)成(cheng)因(yin)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)成(cheng)因(yin)多(duo)种(zhong)多(duo)样(yang)，(，)其(qi)中(zhong)最(zui)常(chang)见(jian)的(de)原(yuan)因(yin)是(shi)牙(ya)周(zhou)病(bing)。(。)牙(ya)周(zhou)病(bing)通(tong)常(chang)由(you)口(kou)腔(qiang)内(nei)细(xi)菌(jun)感(gan)染(ran)引(yin)起(qi)，(，)导(dao)致(zhi)牙(ya)龈(yin)发(fa)炎(yan)，(，)从(cong)而(er)出(chu)现(xian)红(hong)肿(zhong)、(、)出(chu)血(xue)等(deng)症(zheng)状(zhuang)。(。)此(ci)外(wai)，(，)不(bu)良(liang)的(de)口(kou)腔(qiang)卫(wei)生(sheng)习(xi)惯(guan)，(，)如(ru)不(bu)规(gui)律(lv)刷(shua)牙(ya)、(、)缺(que)乏(fa)牙(ya)线(xian)使(shi)用(yong)，(，)也(ye)会(hui)使(shi)牙(ya)菌(jun)斑(ban)积(ji)聚(ju)，(，)进(jin)一(yi)步(bu)加(jia)重(zhong)炎(yan)症(zheng)。(。)另(ling)一(yi)种(zhong)常(chang)见(jian)的(de)原(yuan)因(yin)是(shi)牙(ya)龈(yin)外(wai)伤(shang)，(，)例(li)如(ru)咬(yao)硬(ying)物(wu)、(、)刷(shua)牙(ya)过(guo)于(yu)用(yong)力(li)或(huo)使(shi)用(yong)不(bu)适(shi)合(he)的(de)牙(ya)刷(shua)，(，)这(zhe)些(xie)都(dou)可(ke)能(neng)导(dao)致(zhi)牙(ya)龈(yin)损(sun)伤(shang)，(，)进(jin)而(er)引(yin)发(fa)肿(zhong)痛(tong)。(。)此(ci)外(wai)，(，)一(yi)些(xie)全(quan)身(shen)性(xing)疾(ji)病(bing)，(，)如(ru)糖(tang)尿(niao)病(bing)、(、)免(mian)疫(yi)系(xi)统(tong)疾(ji)病(bing)等(deng)，(，)也(ye)可(ke)能(neng)影(ying)响(xiang)牙(ya)龈(yin)健(jian)康(kang)，(，)使(shi)其(qi)更(geng)容(rong)易(yi)发(fa)生(sheng)肿(zhong)痛(tong)。(。)#(#)#(#)#(#)#(#)二(er)、(、)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)症(zheng)状(zhuang)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)主(zhu)要(yao)症(zheng)状(zhuang)包(bao)括(kuo)牙(ya)龈(yin)红(hong)肿(zhong)、(、)压(ya)痛(tong)、(、)出(chu)血(xue)，(，)甚(shen)至(zhi)在(zai)进(jin)食(shi)时(shi)感(gan)到(dao)疼(teng)痛(tong)。(。)有(you)时(shi)患(huan)者(zhe)还(hai)可(ke)能(neng)伴(ban)随(sui)口(kou)臭(chou)、(、)牙(ya)齿(chi)松(song)动(dong)等(deng)症(zheng)状(zhuang)。(。)发(fa)生(sheng)牙(ya)龈(yin)肿(zhong)痛(tong)后(hou)，(，)及(ji)时(shi)去(qu)牙(ya)科(ke)诊(zhen)所(suo)就(jiu)医(yi)是(shi)非(fei)常(chang)重(zhong)要(yao)的(de)，(，)以(yi)确(que)定(ding)具(ju)体(ti)病(bing)因(yin)并(bing)进(jin)行(xing)相(xiang)应(ying)治(zhi)疗(liao)。(。)#(#)#(#)#(#)#(#)三(san)、(、)牙(ya)龈(yin)肿(zhong)痛(tong)的(de)预(yu)防(fang)1(1).(.)*(*)*(*)保(bao)持(chi)良(liang)好(hao)的(de)口(kou)腔(qiang)卫(wei)生(sheng)*(*)*(*)：(：)