首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4930467篇
  免费   408956篇
  国内免费   16237篇
耳鼻咽喉   70634篇
儿科学   151270篇
妇产科学   128105篇
基础医学   743046篇
口腔科学   142393篇
临床医学   449372篇
内科学   906747篇
皮肤病学   118675篇
神经病学   418791篇
特种医学   192747篇
外国民族医学   1030篇
外科学   753419篇
综合类   136535篇
现状与发展   23篇
一般理论   2766篇
预防医学   409266篇
眼科学   116508篇
药学   354344篇
  23篇
中国医学   13882篇
肿瘤学   246084篇
  2021年   59252篇
  2019年   66895篇
  2018年   82612篇
  2017年   63813篇
  2016年   70578篇
  2015年   83689篇
  2014年   118768篇
  2013年   186035篇
  2012年   143182篇
  2011年   148995篇
  2010年   135386篇
  2009年   134415篇
  2008年   133817篇
  2007年   142222篇
  2006年   149930篇
  2005年   144343篇
  2004年   144176篇
  2003年   133823篇
  2002年   123739篇
  2001年   187295篇
  2000年   184700篇
  1999年   167480篇
  1998年   74902篇
  1997年   70218篇
  1996年   67995篇
  1995年   63752篇
  1994年   57737篇
  1993年   53520篇
  1992年   124962篇
  1991年   119809篇
  1990年   114447篇
  1989年   111624篇
  1988年   103487篇
  1987年   101503篇
  1986年   96117篇
  1985年   93967篇
  1984年   76787篇
  1983年   67897篇
  1982年   51598篇
  1981年   47759篇
  1980年   44835篇
  1979年   67987篇
  1978年   53236篇
  1977年   47110篇
  1976年   43296篇
  1975年   43583篇
  1974年   49561篇
  1973年   47379篇
  1972年   44578篇
  1971年   41171篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
41.
The coronavirus 2019 pandemic has affected almost every aspect of health care delivery in the United States, and the emergency medicine system has been hit particularly hard while dealing with this public health crisis. In an unprecedented time in our history, medical systems and clinicians have been asked to be creative, flexible, and innovative, all while continuing to uphold the important standards in the US health care system. To continue providing quality services to patients during this extraordinary time, care providers, organizations, administrators, and insurers have needed to alter longstanding models and procedures to respond to the dynamics of a pandemic. The Emergency Medicine Treatment and Active Labor Act of 1986, or EMTALA, is 1 example of where these alterations have allowed health care facilities and clinicians to continue their work of caring for patients while protecting both the patients and the clinicians themselves from infectious exposures at the same time.  相似文献   
42.
Isolated patellofemoral arthritis is an increasingly recognized entity, and is usually associated with previous patellofemoral dysplasia or instability. Patellofemoral arthroplasty (PFA) has evolved significantly in recent years, both in terms of implant design and importantly in the understanding of appropriate patient selection. This review outlines the indications and investigations for PFA, provides a brief history of the development of contemporary implants, and presents the clinical outcomes for the prostheses most commonly used in the UK. In addition, it provides a detailed surgical technique for implantation of an onlay implant, with tips on how to optimize patellofemoral biomechanics and thus achieve a consistently good outcome.  相似文献   
43.
44.
Immunoglobulin light chain amyloidosis (AL) commonly presents with nephrotic range proteinuria, heart failure with preserved ejection fraction, nondiabetic peripheral neuropathy, unexplained hepatomegaly or diarrhea, and should be considered in patients presenting with these symptoms. More importantly, patients being monitored for smoldering multiple myeloma and a monoclonal gammopathy of undetermined significance (MGUS) are at risk for developing AL amyloidosis. MGUS and myeloma patients that have atypical features, including unexplained weight loss; lower extremity edema, early satiety, and dyspnea on exertion should be considered at risk for light chain amyloidosis. Overlooking the diagnosis of light chain amyloidosis leading to therapy delay is common, and it represents an error of diagnostic consideration. Herein we provide a review of established and investigational treatments for patients with AL amyloidosis and provide algorithms for workup and management of these patients.Subject terms: Myeloma, Chemotherapy  相似文献   
45.
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...  相似文献   
46.
47.
Fibroblast growth factor receptors (FGFRs) are aberrantly activated through single-nucleotide variants, gene fusions and copy number amplifications in 5–10% of all human cancers, although this frequency increases to 10–30% in urothelial carcinoma and intrahepatic cholangiocarcinoma. We begin this review by highlighting the diversity of FGFR genomic alterations identified in human cancers and the current challenges associated with the development of clinical-grade molecular diagnostic tests to accurately detect these alterations in the tissue and blood of patients. The past decade has seen significant advancements in the development of FGFR-targeted therapies, which include selective, non-selective and covalent small-molecule inhibitors, as well as monoclonal antibodies against the receptors. We describe the expanding landscape of anti-FGFR therapies that are being assessed in early phase and randomised controlled clinical trials, such as erdafitinib and pemigatinib, which are approved by the Food and Drug Administration for the treatment of FGFR3-mutated urothelial carcinoma and FGFR2-fusion cholangiocarcinoma, respectively. However, despite initial sensitivity to FGFR inhibition, acquired drug resistance leading to cancer progression develops in most patients. This phenomenon underscores the need to clearly delineate tumour-intrinsic and tumour-extrinsic mechanisms of resistance to facilitate the development of second-generation FGFR inhibitors and novel treatment strategies beyond progression on targeted therapy.Subject terms: Cancer, Cancer  相似文献   
48.
49.
50.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号