专业术语一低脂食物并不能减少健康风险4Thatcouldmeanthatfatinthedietmayhaveasmalleffect,Dr.Rossouwsaid,perhapsinsomesubgroupsofwomenoroveralongerperiodoftime.HeaddedthatthestudyinvestigatorsMediterraneandressingsdietitian4onetime,thatwilldonexttonothing.,Thewomeninthestudyhad18sessionsinsmallgroupswithatrainednutritionistinthefirstyearandfoursessionsayearafterthat.Inthefirstyear,thewomenonthelow-fatdietsreducedthepercentageoffatintheirdietto24percentofdailycalories,andbytheendofthestudytheirdietshad29percentoftheircaloriesasfat.Inthefirstyear,thewomeninthecontrolgroupwereeating35percentoftheircaloriesasfat,andbytheendofthestudytheirdietaryfatcontentwas37percent.Thetwogroupsconsumedaboutthesamenumberofcalories.Somemedicalspecialistsemphasizedthatthestudydidnotmeanpeopleshouldabandonlow-fatdiets.,zWhatwearesayingisthatamodestreductionoffatandasubstitutionwithfruitsandvegetablesdidnotdoanythingforheartdiseaseandstrokeorbreastcancerorcolorectalcancer,zsaidDr.NanetteK.Wenger,acardiologistandprofessorofmedicineatEmoryUniversitySchoolofMedicineinAtlanta.Itdoesn,tsaythatthisdietisnotbeneficial.ButDr.Freedman,theBerkeleystatistician,saidtheoveralllessonwasclear.,We,inthescientificcommunity,oftengivestrongadvicebasedonflimsyevidence,hesaid.ThatSwhywehavetodoexperiments.,