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   1338166篇
  免费   96188篇
  国内免费   2932篇
耳鼻咽喉   19775篇
儿科学   40309篇
妇产科学   38717篇
基础医学   187717篇
口腔科学   39998篇
临床医学   112789篇
内科学   263053篇
皮肤病学   30304篇
神经病学   106690篇
特种医学   53826篇
外国民族医学   435篇
外科学   209106篇
综合类   31046篇
现状与发展   6篇
一般理论   437篇
预防医学   92042篇
眼科学   31441篇
药学   100350篇
  3篇
中国医学   2993篇
肿瘤学   76249篇
  2018年   11836篇
  2015年   11981篇
  2014年   16833篇
  2013年   25408篇
  2012年   33245篇
  2011年   35125篇
  2010年   20930篇
  2009年   20371篇
  2008年   33804篇
  2007年   36909篇
  2006年   37482篇
  2005年   36231篇
  2004年   35309篇
  2003年   34252篇
  2002年   33779篇
  2001年   63714篇
  2000年   65450篇
  1999年   55496篇
  1998年   14715篇
  1997年   13508篇
  1996年   12983篇
  1995年   12261篇
  1994年   11506篇
  1992年   42841篇
  1991年   41339篇
  1990年   40628篇
  1989年   39627篇
  1988年   37046篇
  1987年   36474篇
  1986年   34964篇
  1985年   33148篇
  1984年   24858篇
  1983年   21093篇
  1982年   12680篇
  1981年   11585篇
  1980年   10789篇
  1979年   23955篇
  1978年   17093篇
  1977年   14865篇
  1976年   13399篇
  1975年   15280篇
  1974年   18095篇
  1973年   17579篇
  1972年   16835篇
  1971年   15743篇
  1970年   14930篇
  1969年   14367篇
  1968年   13478篇
  1967年   12025篇
  1966年   11269篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
151.

Objective

A rapid and worrying emergence of vancomycin-resistant enterococci (VRE) gut colonization is occurring worldwide and may be responsible for outbreaks, especially in healthcare facilities. While no efficient decolonization strategies are recommended, we assessed fecal microbiota transplantation (FMT) to eradicate VRE colonization.

Patients and method

Our main objective was to measure the impact of FMT on decolonization of VRE carriers, confirmed by at least two consecutive negative rectal swabs at one-week interval during a 3-month follow-up period. Patients received no antibiotic prior to the FMT.

Results

After a month only three patients remained colonized with VRE. Decolonization was associated with 87.5% (n = 7) of success after three months as only one patient remained colonized.

Conclusion

Our first results confirm that the FMT seems to be safe, with an impact on VRE colonization over time that may help control outbreaks.  相似文献   
152.
153.
154.
155.
156.
157.

Background

Inflammation and infections have been associated with prostate cancer progression. We assessed whether elevated serum cytokines or T. vaginalis seropositivity at the time of diagnosis was associated with higher grade or lethal prostate cancer.

Patients and Methods

Men with localized or metastatic prostate cancer were included in this study. Cytokine serum levels including interleukin (IL)-1α, IL-1β, IL-2, IL-6, IL-8, monocyte chemotactic protein 1 (CCL-2), tumor necrosis factor α, and growth-regulated oncogene α (CXCL-1) using a multiplex enzyme-linked immunosorbent assay and T. vaginalis serology were measured in blood samples at diagnosis.

Results

A total of 324 patients were identified at time of localized disease and 118 at time of metastatic disease. Of the 189 patients with localized disease and clinical follow-up data (median, 73 months), 28 developed lethal disease. There was no association between circulating cytokine levels above median concentrations nor T. vaginalis seropositivity and risk of intermediate- to high-risk or lethal prostate cancer.

Conclusion

Higher levels of serum cytokine levels and T. vaginalis seropositivity at diagnosis are not associated with high-grade or lethal prostate cancer and do not aid risk stratification of localized prostate cancer.  相似文献   
158.

Objective

The teaching hospital of Nancy, France, implemented a specific multidisciplinary care pathway (French acronym AMDPL) to improve the management of patients presenting with Lyme borreliosis (LB) suspicion. We aimed to assess the first year of activity of this care pathway.

Patients and methods

We included all patients managed in the AMDPL pathway from November 1, 2016 to October 31, 2017. The first step was a dedicated Lyme disease consultation with an infectious disease specialist. Following this consultation, the LB diagnosis was either confirmed and adequate treatment was prescribed, or a differential diagnosis was established and patients received adequate management, or further investigations were required and patients were offered multidisciplinary management as part of a day hospitalization.

Results

A total of 468 patients were included. LB diagnosis was confirmed in 15% of patients (69/468), 49% of patients received a differential diagnosis, and 26% (122/468) of patients had the LB diagnosis ruled out without receiving any other diagnosis.

Conclusions

This is to our knowledge the first multidisciplinary center implemented in France for the management of patients presenting with LB suspicion related to polymorphous signs and symptoms. Several diagnoses could be confirmed or corrected, although some symptoms and complaints could not be explained. This cohort could improve our knowledge of LB and its differential diagnoses.  相似文献   
159.
Struan H. Coleman 《Arthroscopy》2019,35(4):1109-1110
Dancers have a disproportionately high prevalence of hip issues compared with other types of athletes. Many of these hip issues are complex: a cam and/or pincer impingement combined with a seemingly paradoxical borderline dysplasia, capsular laxity, and subsequent instability. Our experience as nonarthritic hip surgeons tells us that careful patient selection is critical for a successful outcome after the arthroscopic treatment of a dancer. But, there is little guidance in the literature on the management of this specific group of patients. We have studies that advise us to repair the labrum when possible versus performing labral debridement in female patients with predominantly pincer-type impingement and studies that support capsular plication and careful capsule closure in patients, predominantly female patients, with combined hip impingement and dysplasia or borderline dysplasia. However, few studies have examined predictors of outcomes after hip arthroscopy in dancers.  相似文献   
160.
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