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   55907篇
  免费   5556篇
  国内免费   2082篇
耳鼻咽喉   164篇
儿科学   2360篇
妇产科学   595篇
基础医学   3002篇
口腔科学   294篇
临床医学   8791篇
内科学   12480篇
皮肤病学   349篇
神经病学   1670篇
特种医学   1411篇
外国民族医学   9篇
外科学   5371篇
综合类   10955篇
现状与发展   13篇
一般理论   1篇
预防医学   2848篇
眼科学   604篇
药学   5396篇
  71篇
中国医学   3375篇
肿瘤学   3786篇
  2024年   137篇
  2023年   1099篇
  2022年   1331篇
  2021年   3143篇
  2020年   2810篇
  2019年   2107篇
  2018年   1926篇
  2017年   2106篇
  2016年   2366篇
  2015年   2251篇
  2014年   3717篇
  2013年   4121篇
  2012年   3349篇
  2011年   3645篇
  2010年   2828篇
  2009年   2602篇
  2008年   2603篇
  2007年   2758篇
  2006年   2493篇
  2005年   2350篇
  2004年   2130篇
  2003年   2030篇
  2002年   1285篇
  2001年   1138篇
  2000年   999篇
  1999年   769篇
  1998年   704篇
  1997年   641篇
  1996年   503篇
  1995年   509篇
  1994年   406篇
  1993年   302篇
  1992年   297篇
  1991年   239篇
  1990年   178篇
  1989年   206篇
  1988年   189篇
  1987年   147篇
  1986年   136篇
  1985年   222篇
  1984年   145篇
  1983年   101篇
  1982年   123篇
  1981年   105篇
  1980年   72篇
  1979年   67篇
  1978年   52篇
  1977年   36篇
  1976年   29篇
  1975年   19篇
排序方式: 共有10000条查询结果,搜索用时 538 毫秒
11.
目的探讨脑卒中患者急性应激障碍发生现状及影响因素。方法采用斯坦福急性应激反应问卷对349例脑卒中住院患者进行调查。结果共163例(46.70%)患者发生急性应激障碍;Logistic回归分析结果显示,患者性格、是否存在偏瘫及是否吞咽功能障碍是脑卒中患者发生急性应激障碍的主要影响因素(P0.05,P0.01)。结论脑卒中患者急性应激障碍发生率较高,内向性格及存在偏瘫和吞咽功能障碍的患者更容易发生急性应激障碍。医护人员应及时为高危患者提供个体化治疗及预见性护理,防止脑卒中患者发生急性应激障碍。  相似文献   
12.

Background

The objective of the study was to evaluate the outcomes of clinically localized prostate cancer treated with prostatectomy versus radiation therapy within the context of a prospective prostate cancer screening study.

Patients and Methods

Within the PLCO (Prostate, Lung, Colorectal, and Ovary) trial, patients who were diagnosed with clinically localized prostate cancer and subsequently received treatment with prostatectomy or radiation therapy (with or without hormonal treatment) were included. Univariate and multivariate Cox regression analyses were then performed to determine factors affecting overall and prostate cancer-specific survival. Factors with P < .05 in univariate analysis were included in the multivariate analysis.

Results

A total of 3953 patients were included in the current analysis. These included 2044 patients treated with prostatectomy and 1909 patients treated with radiation therapy with or without hormonal treatment. In an adjusted multivariate analysis for factors affecting overall survival, prostatectomy was associated with better overall survival compared with radiation therapy (hazard ratio, 0.548; 95% confidence interval [CI], 0.440- 681; P < .001). Likewise, in an adjusted multivariate analysis for factors affecting prostate cancer-specific survival, prostatectomy was associated with better prostate cancer-specific survival compared with radiation therapy (hazard ratio, 0.485; 95% CI, 0.286- 0.822; P = .007). Similar findings were found with propensity score matching and repeating the same analyses on the post-matching cohort.

Conclusion

Prostatectomy seems to predict better overall and prostate cancer-specific survival compared with radiation therapy among patients with clinically localized prostate cancer diagnosed within the PLCO trial.  相似文献   
13.
Patients with Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) have poor prognosis, and the efficacy of chemotherapy plus tyrosine kinase inhibitors (TKIs) followed by mismatched donor stem cell infusion (microtransplantation, MST) has not been determined. We retrospectively summarized 45 patients including 11 undergoing MST with TKIs, 17 receiving allogeneic transplant and 17 undergoing chemotherapy with TKIs. Improved 4-year overall survival rate was observed in the MST group (91%) compared with either transplant group (31%, P = .005) or chemotherapy group (36%, P = .013). The MST group also had higher 2-year and 4-year leukemia-free survival rates (91% and 72%, respectively) compared with either transplant group (33%, P = .005 and 33%, P = .021, respectively) or chemotherapy group (41%, P = .017 and 31%, P = .023, respectively). 2-year and 4-year cumulative incidences of hematologic relapse were lower in the MST group (9% and 28%, respectively) compared with those in the chemotherapy group (56%, P = .025 and 67%, P = .034, respectively). In patients undergoing MST, donor microchimerism was detected (1.07 × 10-5 to 6.6 × 10-4 copies from 9 to 1499 days) in 7 patients, and donor/patient-derived HLA*0201/2402+WT1+CD8+ T cells were found from 0.05% to 0.67% in 6 patients. MST may provide a favorable treatment for patients with Ph+ ALL.  相似文献   
14.
15.
16.
This paper describes country-wide special measures undertaken for interventional radiology staff during the current coronavirus disease 2019 (COVID-19) pandemic. Although each interventional radiology service around the world faces unique challenges, the principles outlined in this article will be useful when designing or strengthening individual practices and integrating them within wider hospital and national measures. Moving beyond the current outbreak, these measures will be useful for any future infectious diseases which are likely to arise.  相似文献   
17.
18.
19.
20.
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