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   30875篇
  免费   2145篇
  国内免费   271篇
耳鼻咽喉   435篇
儿科学   538篇
妇产科学   656篇
基础医学   4388篇
口腔科学   928篇
临床医学   2715篇
内科学   5755篇
皮肤病学   656篇
神经病学   2323篇
特种医学   1772篇
外国民族医学   1篇
外科学   4830篇
综合类   448篇
现状与发展   1篇
一般理论   11篇
预防医学   1536篇
眼科学   718篇
药学   2628篇
  3篇
中国医学   347篇
肿瘤学   2602篇
  2023年   217篇
  2022年   503篇
  2021年   856篇
  2020年   506篇
  2019年   734篇
  2018年   811篇
  2017年   661篇
  2016年   753篇
  2015年   1106篇
  2014年   1348篇
  2013年   1565篇
  2012年   2276篇
  2011年   2248篇
  2010年   1386篇
  2009年   1262篇
  2008年   1772篇
  2007年   1714篇
  2006年   1598篇
  2005年   1530篇
  2004年   1381篇
  2003年   1198篇
  2002年   1083篇
  2001年   876篇
  2000年   898篇
  1999年   715篇
  1998年   246篇
  1997年   221篇
  1996年   202篇
  1995年   187篇
  1994年   151篇
  1993年   138篇
  1992年   339篇
  1991年   283篇
  1990年   284篇
  1989年   255篇
  1988年   212篇
  1987年   148篇
  1986年   146篇
  1985年   130篇
  1984年   125篇
  1983年   93篇
  1982年   73篇
  1981年   74篇
  1980年   71篇
  1979年   93篇
  1978年   89篇
  1977年   77篇
  1974年   69篇
  1973年   64篇
  1972年   73篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
Diabetes mellitus(DM) negatively affects the development and progression of chronic liver diseases(CLD) of various etiologies. Concurrent DM and CLD are also associated with worse clinical outcomes with respect to mortality, the occurrence of hepatic decompensation, and the development of hepatocellular carcinoma(HCC). Unfortunately, early diagnosis and optimal treatment of DM can be challenging, due to the lack of established clinical guidelines as well as the medical complexity of this patient population. We conducted an exploratory review of relevant literature to provide an up-to-date review for internists and hepatologists caring for this patient population. We reviewed the epidemiological and pathophysiological associations between DM and CLD, the impact of insulin resistance on the progression and manifestations of CLD, the pathogenesis of hepatogenic diabetes, as well as the practical challenges in diagnosis and monitoring of DM in this patient population. We also reviewed the latest clinical evidence on various pharmacological antihyperglycemic therapies with an emphasis on liver disease-related clinical outcomes. Finally, we proposed an algorithm for managing DM in patients with CLD and discussed the clinical and research questions that remain to be addressed.  相似文献   
6.
7.
8.
Laparoscopic surgery has several advantages over traditional surgery because it has been shown to be less invasive. The next logical step in the evolution of minimally invasive surgery may be to eliminate all abdominal incisions. The natural orifices provide a port of entry via the gastrointestinal tract to the peritoneal cavity. This approach would require the creation of a perforation, which is considered to be a major complication of endoscopy with significant morbidity and mortality. However, there are several recent studies that have described the technical feasibility and safety of a per‐oral transgastric approach to the peritoneal cavity using conventional endoscopes. Theoretically, this approach could reduce postoperative abdominal wall pain, wound infection, hernia formation, and adhesions. This article aims to summarize the current status of transgastric surgery, currently referred to as natural orifice transluminal endoscopic surgery (NOTES), and to address some of its future challenges.  相似文献   
9.
10.
Abstract: Data from the National Education Longitudinal Study were combined with census data at the zip code level to examine the impact of neighborhood racial and ethnic diversity and consolidated inequality, in addition to individual, family, and school factors, on the likelihood of dropping out of high school. Results indicate that while the effects for diversity and consolidated inequality did not support the stated hypotheses, main effects for family risk and prior academic achievement were significant and in the stated direction. Also, when controlling for individual, family, school, and neighborhood characteristics, African Americans were less likely than White students to drop out of school. Implications for contextual effects research and educational outcomes are discussed.  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