简介:在2015年即将与我们告别之际,欢迎走进本期专题——2015年终盘点。除非你出生在1945年之前,否则你绝不会记得让联合国应运而生的那场灾难。正是这场灾难奠定了联合国的理想,并使之明确了自己的使命。根据《联合国宪章》的规定,联合国的使命包括“促成较大自由中的社会进步和生活水平的改善”,“重申基本人权、人格尊严与价值,以及男女与大小各国平等权利的信念”,“使我们的子孙后代远离战争的蹂躏”。本期,让我们在“WhyWeNeedtheUnitedNations?”中回顾联合国的前世今生与是非功过,一起庆祝联合国成立70周年。
简介:Over20yearsofresearchhasledtothenowwidelyacceptedroleofcardiacresynchronizationtherapy(CRT)inmedicallyrefractory,mildtoseveresystolicheartfailure(HF)withincreasedQRSduration.Inadditiontoconferringamortalitybenefit,CRThasbeenshowntoreduceHFhospitalizationratesandimprovefunctionalstatusinthispopulation.However,notallpatientsconsistentlydemonstrateapositiveresponsetoCRT.EffortstoimproveresponsetoCRThavefocusedonimprovingpatientselectionandoptimizingdeviceimplantationandfollow-up,therebycorrectingelectricalandmechanicaldyssynchrony.Inthisarticlewereviewthepathobiologyofcardiacdyssynchrony,therationalefortheuseofCRT,thehistoryandthestateoftheartofCRT,andguidelinesandrecommendationsforCRT,whilealsofocusingontheareasofcontroversyandpotentialfutureapplications.
简介:Inthefirsthalfof2015,rareearthmarketdeclinedafteraperiodofpricerising.Rareearthpricesfacedseverdownwardpressurecurrently.Itwasthoughtthefallingtrendcouldlastforsometime.InearlyJanuary,mainstreampriceofdidymiumoxidewas280,000-285,000yuan/ton.Itstartedtoriseslowlyandincreasedby10,000-12,000yuanpertoninearlyFebruary.Thepriceofdidymiumoxidehad