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   1402552篇
  免费   96116篇
  国内免费   2758篇
耳鼻咽喉   19113篇
儿科学   39088篇
妇产科学   36358篇
基础医学   198877篇
口腔科学   38932篇
临床医学   123982篇
内科学   275447篇
皮肤病学   27791篇
神经病学   112211篇
特种医学   56169篇
外国民族医学   133篇
外科学   225122篇
综合类   27216篇
现状与发展   3篇
一般理论   555篇
预防医学   95181篇
眼科学   32485篇
药学   105148篇
  32篇
中国医学   3175篇
肿瘤学   84408篇
  2021年   12643篇
  2019年   12703篇
  2018年   18050篇
  2017年   13616篇
  2016年   15285篇
  2015年   17545篇
  2014年   24116篇
  2013年   34684篇
  2012年   47841篇
  2011年   49537篇
  2010年   29841篇
  2009年   27902篇
  2008年   46586篇
  2007年   49109篇
  2006年   49339篇
  2005年   47877篇
  2004年   45919篇
  2003年   43273篇
  2002年   41856篇
  2001年   66965篇
  2000年   68628篇
  1999年   57793篇
  1998年   15849篇
  1997年   13895篇
  1996年   13559篇
  1995年   12678篇
  1994年   11620篇
  1993年   10834篇
  1992年   43055篇
  1991年   41596篇
  1990年   40282篇
  1989年   39061篇
  1988年   35634篇
  1987年   34653篇
  1986年   32486篇
  1985年   31171篇
  1984年   22663篇
  1983年   19349篇
  1982年   10882篇
  1979年   20055篇
  1978年   13905篇
  1977年   11911篇
  1976年   10486篇
  1975年   11461篇
  1974年   13751篇
  1973年   13136篇
  1972年   12333篇
  1971年   11653篇
  1970年   11080篇
  1969年   10339篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Quality of Life Research - The COVID-19 pandemic might add to the stressors experienced by people living with rheumatic diseases. This study aimed to examine rheumatic patients’ functional...  相似文献   
2.
European Surgery - Large skin defects caused by trauma (e.g., burns) or due to other reasons (e.g., tumor-related skin resections) require sufficient skin replacement. The constant improvement of...  相似文献   
3.
Die Anaesthesiologie - Phantomschmerzen haben eine hohe Prävalenz nach Majoramputationen und sind mit einer zusätzlichen Einschränkung der Lebensqualität verbunden....  相似文献   
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.
Two Janus-associated kinase inhibitors (JAKi) (initially ruxolitinib and, more recently, fedratinib) have been approved as treatment options for patients who have intermediate-risk and high-risk myelofibrosis (MF), with pivotal trials demonstrating improvements in spleen volume, disease symptoms, and quality of life. At the same time, however, clinical trial experiences with JAKi agents in MF have demonstrated a high frequency of discontinuations because of adverse events or progressive disease. In addition, overall survival benefits and clinical and molecular predictors of response have not been established in this population, for which the disease burden is high and treatment options are limited. Consistently poor outcomes have been documented after JAKi discontinuation, with survival durations after ruxolitinib ranging from 11 to 16 months across several studies. To address such a high unmet therapeutic need, various non-JAKi agents are being actively explored (in combination with ruxolitinib in first-line or salvage settings and/or as monotherapy in JAKi-pretreated patients) in phase 3 clinical trials, including pelabresib (a bromodomain and extraterminal domain inhibitor), navitoclax (a B-cell lymphoma 2/B-cell lymphoma 2-xL inhibitor), parsaclisib (a phosphoinositide 3-kinase inhibitor), navtemadlin (formerly KRT-232; a murine double-minute chromosome 2 inhibitor), and imetelstat (a telomerase inhibitor). The breadth of data expected from these trials will provide insight into the ability of non-JAKi treatments to modify the natural history of MF.  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