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   1321426篇
  免费   104711篇
  国内免费   2052篇
耳鼻咽喉   19078篇
儿科学   45583篇
妇产科学   36260篇
基础医学   189007篇
口腔科学   34703篇
临床医学   117551篇
内科学   265989篇
皮肤病学   28615篇
神经病学   103945篇
特种医学   52928篇
外国民族医学   662篇
外科学   202353篇
综合类   28081篇
现状与发展   1篇
一般理论   411篇
预防医学   100628篇
眼科学   28561篇
药学   98214篇
  2篇
中国医学   2474篇
肿瘤学   73143篇
  2018年   13984篇
  2017年   10577篇
  2016年   11624篇
  2015年   13138篇
  2014年   18275篇
  2013年   27926篇
  2012年   38254篇
  2011年   40370篇
  2010年   24070篇
  2009年   22929篇
  2008年   38575篇
  2007年   41324篇
  2006年   41495篇
  2005年   40423篇
  2004年   39510篇
  2003年   38294篇
  2002年   37666篇
  2001年   65380篇
  2000年   67874篇
  1999年   57624篇
  1998年   15742篇
  1997年   14238篇
  1996年   14602篇
  1995年   13927篇
  1994年   13187篇
  1993年   12192篇
  1992年   45631篇
  1991年   44405篇
  1990年   43145篇
  1989年   41011篇
  1988年   37701篇
  1987年   37054篇
  1986年   34402篇
  1985年   33139篇
  1984年   24803篇
  1983年   20839篇
  1982年   12161篇
  1981年   11041篇
  1980年   9866篇
  1979年   21955篇
  1978年   15284篇
  1977年   12916篇
  1976年   12061篇
  1975年   12930篇
  1974年   15102篇
  1973年   14496篇
  1972年   13297篇
  1971年   12060篇
  1970年   11355篇
  1969年   10292篇
排序方式: 共有10000条查询结果,搜索用时 250 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.
3.
4.
5.
6.
7.
8.
9.
Gestational trophoblastic neoplasia (GTN) patients are treated according to the eight-variable International Federation of Gynaecology and Obstetrics (FIGO) scoring system, that aims to predict first-line single-agent chemotherapy resistance. FIGO is imperfect with one-third of low-risk patients developing disease resistance to first-line single-agent chemotherapy. We aimed to generate simplified models that improve upon FIGO. Logistic regression (LR) and multilayer perceptron (MLP) modelling (n = 4191) generated six models (M1-6). M1, all eight FIGO variables (scored data); M2, all eight FIGO variables (scored and raw data); M3, nonimaging variables (scored data); M4, nonimaging variables (scored and raw data); M5, imaging variables (scored data); and M6, pretreatment hCG (raw data) + imaging variables (scored data). Performance was compared to FIGO using true and false positive rates, positive and negative predictive values, diagnostic odds ratio, receiver operating characteristic (ROC) curves, Bland-Altman calibration plots, decision curve analysis and contingency tables. M1-6 were calibrated and outperformed FIGO on true positive rate and positive predictive value. Using LR and MLP, M1, M2 and M4 generated small improvements to the ROC curve and decision curve analysis. M3, M5 and M6 matched FIGO or performed less well. Compared to FIGO, most (excluding LR M4 and MLP M5) had significant discordance in patient classification (McNemar's test P < .05); 55-112 undertreated, 46-206 overtreated. Statistical modelling yielded only small gains over FIGO performance, arising through recategorisation of treatment-resistant patients, with a significant proportion of under/overtreatment as the available data have been used a priori to allocate primary chemotherapy. Streamlining FIGO should now be the focus.  相似文献   
10.
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs.  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