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   1055403篇
  免费   73138篇
  国内免费   1633篇
耳鼻咽喉   14891篇
儿科学   28304篇
妇产科学   25850篇
基础医学   149536篇
口腔科学   32567篇
临床医学   88217篇
内科学   214154篇
皮肤病学   23215篇
神经病学   81813篇
特种医学   39644篇
外国民族医学   81篇
外科学   167964篇
综合类   18755篇
现状与发展   1篇
一般理论   274篇
预防医学   73729篇
眼科学   24253篇
药学   81173篇
  3篇
中国医学   2759篇
肿瘤学   62991篇
  2021年   8195篇
  2019年   8826篇
  2018年   13864篇
  2017年   9870篇
  2016年   10424篇
  2015年   11832篇
  2014年   15367篇
  2013年   22631篇
  2012年   33168篇
  2011年   34713篇
  2010年   19604篇
  2009年   17671篇
  2008年   32362篇
  2007年   33963篇
  2006年   34135篇
  2005年   33013篇
  2004年   31257篇
  2003年   29910篇
  2002年   29028篇
  2001年   58224篇
  2000年   60583篇
  1999年   49940篇
  1998年   11216篇
  1997年   9778篇
  1996年   9907篇
  1995年   9190篇
  1994年   8466篇
  1993年   7768篇
  1992年   36659篇
  1991年   34904篇
  1990年   33604篇
  1989年   32602篇
  1988年   29596篇
  1987年   28858篇
  1986年   26885篇
  1985年   25656篇
  1984年   18218篇
  1983年   15447篇
  1982年   7949篇
  1979年   16110篇
  1978年   10801篇
  1977年   9243篇
  1976年   8065篇
  1975年   8893篇
  1974年   10765篇
  1973年   10193篇
  1972年   9632篇
  1971年   9150篇
  1970年   8712篇
  1969年   8214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.
3.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
4.
Introduction: Percutaneous renal mass biopsy has evolved over the last decade with improvements on previous pitfalls including low tissue yield, high non-diagnostic rates, and complications. As understanding of tumor biology and natural history of renal cortical neoplasms has improved, percutaneous renal mass biopsy is poised to have an expanding role in an area characterized by individualized management and refined risk stratification.

Areas covered: This review summarizes the evolution of renal mass biopsy to its current state with respect to outcomes, indications, and clinical guidelines.

Expert opinion: With improved understanding of differential biological potential of renal cortical neoplasms combined with technical improvements in diagnostic yield and accuracy, utilization of renal mass biopsy is becoming an important adjunct to patient care in a broad range of clinical scenarios, including active surveillance, thermal ablation, and use of primary systemic therapy in localized and advanced settings.  相似文献   

5.
6.
7.
8.
Pharmaceutical Chemistry Journal - An HPLC-MS method for simultaneous quantitative determination of a novel gestagenic pharmaceutical and two of its metabolites in rat and rabbit blood sera was...  相似文献   
9.
Aims: In neuropsychological evaluations, it is often difficult to ascertain whether poor performance on measures of validity is due to poor effort or malingering, or whether there is genuine cognitive impairment. Dunham and Denney created an algorithm to assess this question using the Medical Symptom Validity Test (MSVT). We assessed the ability of their algorithm to detect poor validity versus probable impairment, and concordance of failure on the MSVT with other freestanding tests of performance validity.

Methods: Two previously published datasets (n?=?153 and n?=?641, respectively) from outpatient neuropsychological evaluations were used to test Dunham and Denney’s algorithm, and to assess concordance of failure rates with the Test of Memory Malingering and the forced choice measure of the California Verbal Learning Test, two commonly used performance validity tests.

Results: In both datasets, none of the four cutoff scores for failure on the MSVT (70%, 75%, 80%, or 85%) identified a poor validity group with proportionally aligned failure rates on other freestanding measures of performance validity. Additionally, the protocols with probable impairment did not differ from those with poor validity on cognitive measures.

Conclusions: Despite what appeared to be a promising approach to evaluating failure on the easy MSVT subtests when clinical data are unavailable (as recommended in the advanced interpretation program, or advanced interpretation [AI], of the MSVT), the current findings indicate the AI remains the gold standard for doing so. Future research should build on this effort to address shortcomings in measures of effort in neuropsychological evaluations.  相似文献   

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