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   2613089篇
  免费   185882篇
  国内免费   5987篇
耳鼻咽喉   35139篇
儿科学   87925篇
妇产科学   72565篇
基础医学   371114篇
口腔科学   76236篇
临床医学   233786篇
内科学   506908篇
皮肤病学   59997篇
神经病学   202761篇
特种医学   100626篇
外国民族医学   607篇
外科学   392723篇
综合类   58078篇
现状与发展   4篇
一般理论   889篇
预防医学   201247篇
眼科学   61671篇
药学   190354篇
  11篇
中国医学   6270篇
肿瘤学   146047篇
  2021年   20122篇
  2019年   20750篇
  2018年   32319篇
  2017年   25296篇
  2016年   26837篇
  2015年   31186篇
  2014年   41559篇
  2013年   59411篇
  2012年   84865篇
  2011年   85552篇
  2010年   50274篇
  2009年   48139篇
  2008年   76946篇
  2007年   82216篇
  2006年   82930篇
  2005年   86593篇
  2004年   85461篇
  2003年   77948篇
  2002年   71278篇
  2001年   125277篇
  2000年   127071篇
  1999年   107837篇
  1998年   28649篇
  1997年   25161篇
  1996年   25139篇
  1995年   24142篇
  1994年   22185篇
  1993年   20542篇
  1992年   84115篇
  1991年   81825篇
  1990年   79584篇
  1989年   76623篇
  1988年   69814篇
  1987年   68726篇
  1986年   64740篇
  1985年   61539篇
  1984年   45313篇
  1983年   38380篇
  1982年   21788篇
  1979年   41154篇
  1978年   28731篇
  1977年   24361篇
  1976年   22645篇
  1975年   24391篇
  1974年   29700篇
  1973年   28360篇
  1972年   26428篇
  1971年   24619篇
  1970年   22897篇
  1969年   21543篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
2.

Interstitial lung disease (ILD) represents a significant cause of morbidity and mortality in systemic sclerosis (SSc). The purpose of this study was to examine recirculating lymphocytes from SSc patients for potential biomarkers of interstitial lung disease (ILD). Peripheral blood mononuclear cells (PBMCs) were isolated from patients with SSc and healthy controls enrolled in the Vanderbilt University Myositis and Scleroderma Treatment Initiative Center cohort between 9/2017–6/2019. Clinical phenotyping was performed by chart abstraction. Immunophenotyping was performed using both mass cytometry and fluorescence cytometry combined with t-distributed stochastic neighbor embedding analysis and traditional biaxial gating. This study included 34 patients with SSc-ILD, 14 patients without SSc-ILD, and 25 healthy controls. CD21lo/neg cells are significantly increased in SSc-ILD but not in SSc without ILD (15.4 ± 13.3% vs. 5.8 ± 0.9%, p = 0.002) or healthy controls (5.0 ± 0.5%, p < 0.0001). While CD21lo/neg B cells can be identified from a single biaxial gate, tSNE analysis reveals that the biaxial gate is comprised of multiple distinct subsets, all of which are increased in SSc-ILD. CD21lo/neg cells in both healthy controls and SSc-ILD are predominantly tBET positive and do not have intracellular CD21. Immunohistochemistry staining demonstrated that CD21lo/neg B cells diffusely infiltrate the lung parenchyma of an SSc-ILD patient. Additional work is needed to validate this biomarker in larger cohorts and longitudinal studies and to understand the role of these cells in SSc-ILD.

  相似文献   
3.
Die Anaesthesiologie - Auch wenn für Anästhesiologen über Jahrzehnte die Prophylaxe und Therapie postoperativer Schmerzen im Rahmen des postoperativen Patientenkomforts an vorderster...  相似文献   
4.
5.
6.
7.
8.
PurposeUnderstanding the value of genetic screening and testing for monogenic disorders requires high-quality, methodologically robust economic evaluations. This systematic review sought to assess the methodological quality among such studies and examined opportunities for improvement.MethodsWe searched PubMed, Cochrane, Embase, and Web of Science for economic evaluations of genetic screening/testing (2013-2019). Methodological rigor and adherence to best practices were systematically assessed using the British Medical Journal checklist.ResultsAcross the 47 identified studies, there were substantial variations in modeling approaches, reporting detail, and sophistication. Models ranged from simple decision trees to individual-level microsimulations that compared between 2 and >20 alternative interventions. Many studies failed to report sufficient detail to enable replication or did not justify modeling assumptions, especially for costing methods and utility values. Meta-analyses, systematic reviews, or calibration were rarely used to derive parameter estimates. Nearly all studies conducted some sensitivity analysis, and more sophisticated studies implemented probabilistic sensitivity/uncertainty analysis, threshold analysis, and value of information analysis.ConclusionWe describe a heterogeneous body of work and present recommendations and exemplar studies across the methodological domains of (1) perspective, scope, and parameter selection; (2) use of uncertainty/sensitivity analyses; and (3) reporting transparency for improvement in the economic evaluation of genetic screening/testing.  相似文献   
9.
10.
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   
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