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   218332篇
  免费   5811篇
  国内免费   893篇
耳鼻咽喉   2999篇
儿科学   8243篇
妇产科学   6435篇
基础医学   28139篇
口腔科学   6224篇
临床医学   17843篇
内科学   39811篇
皮肤病学   5227篇
神经病学   13634篇
特种医学   11242篇
外国民族医学   99篇
外科学   31312篇
综合类   2247篇
一般理论   13篇
预防医学   18784篇
眼科学   4968篇
药学   15216篇
  9篇
中国医学   519篇
肿瘤学   12072篇
  2021年   1241篇
  2020年   800篇
  2019年   1034篇
  2018年   4532篇
  2017年   4587篇
  2016年   3792篇
  2015年   5571篇
  2014年   5278篇
  2013年   4720篇
  2012年   11685篇
  2011年   6693篇
  2010年   3303篇
  2009年   4737篇
  2008年   3452篇
  2007年   4224篇
  2006年   4281篇
  2005年   12342篇
  2004年   13740篇
  2003年   9266篇
  2002年   4306篇
  2001年   4797篇
  2000年   2203篇
  1999年   6181篇
  1992年   6927篇
  1991年   7152篇
  1990年   7416篇
  1989年   7008篇
  1988年   6521篇
  1987年   6294篇
  1986年   5985篇
  1985年   5282篇
  1984年   3610篇
  1983年   2941篇
  1982年   1040篇
  1980年   860篇
  1979年   3844篇
  1978年   2386篇
  1977年   1800篇
  1976年   1571篇
  1975年   2487篇
  1974年   3110篇
  1973年   2753篇
  1972年   2763篇
  1971年   2752篇
  1970年   2559篇
  1969年   2466篇
  1968年   2243篇
  1967年   2164篇
  1966年   1900篇
  1965年   1136篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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   
2.
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   
3.
4.

Female Genital mutilation/cutting (FGM/C) is associated with enduring psychiatric complications. In this study, we investigate the rates of co-morbid abuses and polyvictimization experienced by survivors of FGM/C. This is a sub-analysis of a cohort study examining the patient population at the EMPOWER Center for Survivors of Sex Trafficking and Sexual Violence in New York City. A retrospective chart-review of electronic medical records was conducted for all consenting adult patients who had FGM/C and had an intake visit between January 16, 2014 and March 6, 2020. Of the 80 participants, ages ranged from 20 to 62 years with a mean of 37.4 (SD?=?9.1) years. In addition to FGM/C, participants were victims of physical abuse (43; 53.8%), emotional abuse (35; 43.8%), sexual abuse (35; 43.8%), forced marriage (20; 25%), child marriage (13; 16.3%), and sex trafficking (1; 1.4%). There was a high degree of polyvictimization, with 41 (51.2%) experiencing 3 or more of the aforementioned abuses. Having FGM/C on or after age 13 or having a higher total abuse score was also found to be strong predictors of depression and PTSD. The high rates of polyvictimization among survivors of FGM/C are associated with development of depression and PTSD. Despite co-morbid abuses, patients still attribute substantial psychiatric symptoms to their FGM/C. Health care providers should understand the high risk of polyvictimization when caring for this patient population.

  相似文献   
5.
6.
7.
8.
9.
10.
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