请阅读短文。 Dowhochoosetogoonexotic,far-flungholidaysdeservefreehealthadvicebeforetheytravel?Andeveniftheypay,whoensuresthattheygetgood,up-to-dateinformation?Who,forthatmatter,shouldcollectthatinformationinthefirstplace?Foravarietyofreasons,travelmedicineinBritainisaresponsibilitynobodywants.Asaresult,manytravellersgoabroadpreparedtoavoidseriousdisease. Whyistravelmedicinesounloved?Partlythere'sanidentityproblem.Becauseittakesaninterestinanythingthatimpingesonthehealthoftravellers,thisemergingmedicalspecialisminvariablycutsacrossthetraditionaldisciplines.Itdelvesintoeverythingfromseasickness,jetlagandthehazardsofcamelstomalariaandplague.Buttravelmedicinehasamoreseriousobstacletoovercome.Travelclinicsaremeanttotellpeoplehowtoavoidendingupdeadorinahospitalwhentheycomehome,butitisnotoriouslydifficulttogetanybodypayoutmoneyforkeepingpeoplehealthy. Travelmedicinehasalsobeencolonizedbycommercialinterests;thevastmajorityoftravelclinicsinBritainarerunbyairlinesortravelcompanies.Andwhiletravelconcernsarehappytosellprofitableinjections,theymaybelesskeentospreadbadnewsabouttravellers'diarrheainTurkey,ortotaketimetospelloutpreventivemeasurestravellerscouldtake."TheNHSfindsitdifficulttodefinetravellers'health,saysRonBehrens,theonlyNHSconsultantintravelanddirectorofthetravelclinicoftheHospitalforTropicalDiseasesinLondon."ShoulditcomewithintheNHSorshoulditbepaidfor?It'sGaryarea,andopinionisspilt.Nooneseemstohaveanyresponsibilityfordefiningitsrole,hesays. Tocompounditslowstatusinthemedicalhierarchy,travelmedicinehastorelyonstatisticsthatarepatchyatbest.Inmostcaseswejustdon'tknowhowmanyBritonscontractdiseaseswhenabroad.Andevenifadiseaselinkedtotravelthereisrarelyanyinformationaboutwherethoseafflictedwent,whattheyare,howtheybehaved,orwhichvaccinationstheyhad.Thisshortageofhardfactsandfiguresmakesitdifficulttogivedetailedadvicetopeople,informationthatmightevensavetheirlives. ArecentleaderinBritishMedicalJournalargued."Travelmedicinewillemergeascredibledisciplinesonlyiftherisksencounteredbytravellersandtherelativebenefitsofpublichealthinterventionsarewelldefinedintermsoftheirrelativeoccurrence,distributionandcontrol.Exactlyhowmuchmoneyiswastedbypoortraveladvice.Therealfigureisanybody'sguess,butitcouldeasily-runintomillions.Behrensgivesoneexample.Britainspendsmorethan1millioneachyearjustoncholeravaccinesthatoftendon'tworkandsogivepeopleafalsesenseofsecurity."Informationonthepreventionandtreatmentofallformsofdiarrheawouldbeabetterpriority,hesalts. Whatcanweinferfrownthefirstparagraph? 查看材料
A.Travel medicine is hard to prevail.
B.People know little about travel medicine.
C.People don't believe in travel medicine.
D.Travellers can seldom get up-to-date information.
正确答案是A