2015年职称英语卫生b级原文出处(补全短文)精选

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1、2015年职称英语卫生B级原文出处(补全短文)　　第八篇LungCancer　　1　Thedeathrateduetocancerofthelungshasincreasedmorethan800percentinmalesandhasmorethandoubledinfemalesduringthelast25years.Itisconsiderablyhigherinurbanandindustrialareasthaninruraldistricts.Therearemanypossiblecau

2、ses,butitisstillcontroversialwhicharemostblameworthy.Thosefactorswhichhavebeenmentionedmostfrequentlyarethepresenceofforeignparticlesandotherirritantsintheair(smokeparticles,smog,exhaustfumes),andthesmokingofcigarettesandcigars.　　2　Numerousstudieshavedem

3、onstratedastrikingcorrelationbetweenthedeathratefromlungcancerandsmokinghabits.Amongheavysmokers—21to30cigarettesperday—themortalityratefromlungcancerisnearly17timestheratefromnonsmokers.Itisexpectedthedeathrateamongwomenwillincreaseasthepresenthighrateo

4、fsmokingamongwomenhasitseffect.　　3　Sometimescasesoflungcancerarediscoveredatthetimeanx-rayistakenforthepurposeofdetectingtuberculosis.Toooften,however,acurrentemphasisuponthedangerofexposuretoradiation1fromX-raymachinescanfrightenpeopleawayfromroutineche

5、stX-raysandthuspreventanearlydiagnosisoflungcancer.Earlydetectionisabsolutelyessentialifanypossibilityofcureistobemaintained2.ModernX-raymachinesincompetenthandsposesuchslightdanger,atleasttothoseover40yearsofage,thatthiswouldbemuchmorethanoffsetbytheadv

6、antagesofdiscoveringatumorwhileitissmallenoughtobecompletelyremoved.3　　4　Acommonformoflungcancerisbronchogeniccarcinoma4，so-calledbecausethemalignancyoriginatesin5abronchus.Thetumormaygrowuntilthebronchusisblocked,cuttingoff6thesupplyofairtothatlung.Thel

7、ungthencollapses,andthesecretionstrappedinthelungspacesbecomeinfected,witharesultingpneumoniaortheformationofalungabscess.Suchalungcancercanalsospreadtocausesecondarygrowthsinthelymphnodes7ofthechestandneckaswellasinthebrainandotherpartsofthebody.Theonly

8、treatmentthatoffersapossibilityofcure,beforesecondarygrowthshavehadtimetoform,istoremovethelungcompletely.Thisoperationiscalledpneumonectomy.　　5　Malignanttumorsofthestomach,thebreast,theprostategland8andotherorgansmaysprea