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   48529篇
  免费   3739篇
  国内免费   157篇
耳鼻咽喉   520篇
儿科学   1455篇
妇产科学   1044篇
基础医学   6185篇
口腔科学   1444篇
临床医学   4979篇
内科学   10253篇
皮肤病学   1093篇
神经病学   4465篇
特种医学   1133篇
外国民族医学   1篇
外科学   7158篇
综合类   723篇
一般理论   27篇
预防医学   4971篇
眼科学   858篇
药学   3274篇
中国医学   141篇
肿瘤学   2701篇
  2023年   351篇
  2022年   256篇
  2021年   1418篇
  2020年   872篇
  2019年   1447篇
  2018年   1723篇
  2017年   1114篇
  2016年   1065篇
  2015年   1335篇
  2014年   1867篇
  2013年   2439篇
  2012年   3622篇
  2011年   3824篇
  2010年   2053篇
  2009年   1865篇
  2008年   2933篇
  2007年   3022篇
  2006年   2868篇
  2005年   2721篇
  2004年   2423篇
  2003年   2200篇
  2002年   2128篇
  2001年   747篇
  2000年   669篇
  1999年   572篇
  1998年   342篇
  1997年   288篇
  1996年   296篇
  1995年   246篇
  1994年   236篇
  1993年   217篇
  1992年   403篇
  1991年   399篇
  1990年   409篇
  1989年   350篇
  1988年   282篇
  1987年   297篇
  1986年   246篇
  1985年   274篇
  1984年   235篇
  1983年   178篇
  1982年   167篇
  1981年   146篇
  1980年   133篇
  1979年   186篇
  1978年   155篇
  1977年   108篇
  1976年   111篇
  1974年   143篇
  1973年   117篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
The coronavirus disease 2019, which is caused by severe acute respiratory syndrome coronavirus 2, was first identified in December 2019 in Wuhan, China, and has since spread rapidly, evolving into a full-blown pandemic. We would like to report our experience after 1 year of this pandemic in the surgical service of a district hospital in Spain. There have been many changes (including new protocols) that our service and the hospital have undergone, to adapt to the new situation. We believe that this experience can be useful for other professionals who have lived and are living a similar situation.  相似文献   
4.
5.
6.
ObjectiveTo assess the evolution of cost per patient/year and the cost per patient/year/drug in patients with rheumatoid arthritis (RA) receiving biological treatments. To analyze and quantify the factors influencing this evolution, such as the optimization of the biological drugs, the use of biosimilars, and official discounts and discounts obtained after negotiated procedures. In addition, to assess specific clinical parameters of disease activity in these patients.MethodsRetrospective, observational study conducted in a Spanish tertiary hospital. Adult patients diagnosed with RA under treatment from 2009 to 2017 were included.Results320, 270 and 389 patients were included in 2009, 2013 and 2017, respectively. The patient/year cost decreased from 10,789€ in 2009, 7491€ in 2013 to 7116€ in 2017. In 2017, due to the established competition, discounts of 14% and 29.5% were achieved on etanercept and its biosimilar; 11.5%, 17.8%, 17.9%, 17.3% on adalimumab, certolizumab, golimumab and tocilizumab IV respectively, and 24.6% and 43.1% on infliximab and its biosimilar. The percentage of patients optimized in 2017 was 35.2%. The annual saving in 2017 was 1,288,535€ (830,000€ due to dose optimization and/or administration regimens, 249,666€ corresponding to 7.5% of the official discount and 208,868€ after negotiated procedures).ConclusionThe annual cost per patient in RA decreased considerably due to different factors, such as discounts on the purchase of drugs due to official discounts and negotiated procedures, together with the optimization of therapies, the latter being the factor that contributed most to this decrease.  相似文献   
7.
8.
BackgroundThe optimal timing of treatment of liver metastases from low-grade neuroendocrine tumors (LG-NELM) varies significantly due to numerous treatment modalities and the literature supporting various treatment(s). This study sought to create and validate a literature-based treatment algorithm for LG-NELM.MethodsA treatment algorithm to maximize overall survival (OS) was designed using peer-reviewed articles evaluating treatment of LG-NELM. This algorithm was retrospectively applied to patients treated for LG-NELM at our institution. Deviation was determined based on whether or not a patient received treatment consistent with that recommended by the algorithm. Patients who did and did not deviate from the algorithm were compared with respect to OS and number of treatments.ResultsApplying our algorithm to a 149-patient cohort, 57 (38%) deviated from recommended treatment. Deviation occurred in the form of alternative (28, 49%) versus additional procedures (29, 51%). Algorithm deviators underwent significantly more procedures than non-deviators (median 1 vs. 2, p < 0.001). Cox model indicated no difference in OS associated with algorithm deviation (HR 1.19, p = 0.58) when controlling for age and tumor characteristics.ConclusionThis literature-based algorithm helps standardize treatment protocols in patients with LG-NELM and can reduce cost and risk by minimizing unnecessary procedures. Prospective implementation and validation is required.  相似文献   
9.
10.
Many patients with terminal cancer wish to die at home and general practitioners in the United Kingdom have a critical role in providing this care. However, it has been suggested general practitioners lack confidence in end-of-life care. It is important to explore with general practitioners their experience and perspectives including feelings of confidence delivering end-of-life care to people with cancer. The aim of this study was to explore general practitioners experiences of providing end-of-life care for people with cancer in the home setting and their perceptions of confidence in this role as well as understanding implications this has on policy design. A qualitative study design was employed using semi-structured interviews and analysed using thematic analysis. Nineteen general practitioners from London were purposively sampled from eight general practices and a primary care university department in 2018–2019, supplemented with snowballing methods. Five main themes were constructed: (a) the subjective nature of defining palliative and end-of-life care; (b) importance of communication and managing expectations; (c) complexity in prescribing; (d) challenging nature of delivering end-of-life care; (e) the unclear role of primary care in palliative care. General practitioners viewed end-of-life care as challenging; specific difficulties surrounded communication and prescribing. These challenges coupled with a poorly defined role created a spread in perceived confidence. Experience and exposure were seen as enabling confidence. Specialist palliative care service expansion had important implications on deskilling of essential competencies and reducing confidence levels in general practitioners. This feeds into a complex cycle of causation, leading to further delegation of care.  相似文献   
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