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   395090篇
  免费   28902篇
  国内免费   8159篇
耳鼻咽喉   4365篇
儿科学   10200篇
妇产科学   7223篇
基础医学   30167篇
口腔科学   9289篇
临床医学   51527篇
内科学   47628篇
皮肤病学   5001篇
神经病学   21058篇
特种医学   8739篇
外国民族医学   37篇
外科学   41083篇
综合类   58996篇
现状与发展   14篇
一般理论   42篇
预防医学   43571篇
眼科学   5761篇
药学   33996篇
  664篇
中国医学   37650篇
肿瘤学   15140篇
  2024年   4077篇
  2023年   7246篇
  2022年   11674篇
  2021年   15962篇
  2020年   15578篇
  2019年   21081篇
  2018年   18257篇
  2017年   15293篇
  2016年   12616篇
  2015年   11770篇
  2014年   23360篇
  2013年   25206篇
  2012年   21032篇
  2011年   23030篇
  2010年   19044篇
  2009年   17072篇
  2008年   16381篇
  2007年   16815篇
  2006年   14832篇
  2005年   12721篇
  2004年   10341篇
  2003年   9085篇
  2002年   7083篇
  2001年   6323篇
  2000年   5236篇
  1999年   4572篇
  1998年   3692篇
  1997年   3479篇
  1996年   3015篇
  1995年   2895篇
  1994年   2751篇
  1993年   2131篇
  1992年   2144篇
  1991年   1843篇
  1990年   1645篇
  1989年   1448篇
  1988年   1377篇
  1985年   3894篇
  1984年   4904篇
  1983年   3418篇
  1982年   3900篇
  1981年   3625篇
  1980年   3257篇
  1979年   2957篇
  1978年   2589篇
  1977年   1948篇
  1976年   2191篇
  1975年   1655篇
  1974年   1452篇
  1973年   1294篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
PurposeTo facilitate decision-making in authorship positions, the International Committee of Medical Journal Editor (ICMJE) developed a guideline that stipulates criteria authors should meet in order to merit authorship. Authors who did not meet these criteria and still enlisted as authors, are called ‘honorary’ authors. In this study, the prevalence and characteristics of honorary authorship (HA) is assessed in the field of Orthopedics and Sports Medicine.MethodsA survey was distributed among corresponding authors of articles published in 2019 in six Orthopedics-dedicated journals.Results479 of the 1392 approached authors responded, leading to a response rate of 34.4%. 91.6% of the respondents were aware of the ICMJE guidelines, whereas 67.8% were aware of the issue of HA. Overall, the prevalence of guideline-based HA was 41.9%, while the prevalence of self-perceived HA was 14.7%. Having a senior member automatically enlisted as author on the departments, was associated with a higher rate of guideline-based HA (OR 5.03) and self-perceived HA (OR 3.31).ConclusionsThe prevalence of HA in the field of Orthopedics and Sports Medicine is high, but comparable to other medical fields. Transparency in authorship decision-making is crucial to maintain liability in scientific articles.  相似文献   
104.
Background/ObjectiveOccurrence of post-dural puncture headache (PDPH) after diagnostic lumbar puncture (LP) for idiopathic intracranial hypertension (IIH) may seem very unlikely in clinical practice. Nevertheless, it has been suggested by several studies, mainly in sub-group analyses. We aimed to evaluate the prevalence of PDPH in an IIH population and determine any eventual predictive factors of PDPH occurrence.MethodsWe conducted a retrospective multiple-center observational study. All newly diagnosed IIH patients who met the International Classification of Headache Disorders (ICHD-3) or the Dandy modified criteria were included from three different French hospitals. They all underwent LP following the same process with the same type of needle. We recorded PDPH occurring within five days after LP, as defined by ICHD-3 criteria.ResultsSeventy-four IIH patients were recruited, of whom 23 (31%) presented with PDPH. Neither classical risk factors for PDPH such as body mass index, age or gender, nor cerebrospinal fluid opening pressure, or specific IIH features were associated with occurrence of PDPH.ConclusionPDPH can occur after LP in IIH patients. Clinicians should be aware of this possible event during the IIH diagnosis assessment and should not automatically reconsider IIH diagnosis. PDPH prevention using an atraumatic needle and dedicated PDPH treatment seem relevant in IIH patients.  相似文献   
105.
106.
AimsOrgan preservation, an important goal in the treatment of head and neck squamous cell carcinoma (HNSCC), may include induction chemotherapy and cisplatin with radiation therapy (CRT). To our knowledge, no reports have directly compared the impact of induction chemotherapy with that of CRT on health-related quality of life (HRQOL).Materials and methodsIn a phase II trial, we assessed the HRQOL of patients treated with induction chemotherapy followed by CRT. Eligible patients had stage III–IV HNSCC. HRQOL questionnaires were administered at baseline, the end of induction (EOI), the end of CRT (EOCRT) and after CRT. Functional Assessment of Cancer Therapy (FACT version 4) assessed HRQOL. We carried out a comparison of changes in HRQOL from baseline to EOI and from EOI to EOCRT. This trial is registered with ClinicalTrials.gov (NCT01566435).ResultsThirty patients were enrolled in the study. Most HRQOL questionnaires were completed (88%). The mean total FACT scores did not differ from baseline to EOI (general: 83.8 versus 79.1, P = 0.08; head and neck: 109.7 versus 105.8, P = 0.33; Total Outcome Index: 69.7 versus 62.3, P = 0.03; respectively, using P ≤ 0.01 to adjust for multiple simultaneous tests of differences). However, total FACT scores significantly worsened from EOI to EOCRT (79.1 versus 62.3, P = 0.01; 105.8 versus 74.2, P < 0.01; 62.3 versus 34.2, P = 0.01; respectively). Within domains, the head and neck cancer subscale score did not differ from baseline to EOI (median 28.5 versus 27.0, P = 0.69), but significantly worsened from EOI to EOCRT (27.0 versus 9.5, P < 0.01). Swallowing, oral pain and voice quality improved from baseline to EOI, but worsened from EOI to EOCRT. Physical and functional scores worsened from baseline to EOI and from EOI to EOCRT. The emotional well-being score improved from baseline to EOI but worsened from EOI to EOCRT.ConclusionsOverall, HRQOL did not significantly change from baseline to EOI but dramatically worsened from EOI to EOCRT.  相似文献   
107.
基于五运六气理论,尤其是三年化疫理论,对当前正在流行的新型冠状病毒感染的肺炎进行病因病机分析及分期诊疗指导。  相似文献   
108.
ABSTRACT

The present study investigated the concomitants of menopause-specific quality of life among premenopausal and postmenopausal women. Based on the Wilson and Cleary model of quality of life, this cross-sectional study recruited 329 women of age 40–65 years following operational convenience. The study was conducted in the office of the Korea Population, Health and Welfare Association (KPHWA) in Incheon, South Korea. Data collected on sociodemographic characteristics, social support, biological/physiological characteristics, the Pittsburgh Sleep Quality Index (PSQI-K), and self-rated health. Menopause-specific quality of life questionnaire (MENQOL) was used in this study. Hierarchical multiple linear regression analysis was performed. The study found that social support and self-rated health were negatively correlated with MENQOL in premenopausal women, while the income level and self-rated health were negatively associated with MENQOL in postmenopausal women. Sleep quality was positively correlated with MENQOL in both premenopausal and postmenopausal women. The study results indicate the need for tailored approaches based on menopausal status. Especially, social support may help improve the MENQOL of premenopausal women, while in postmenopausal women, improved sleep quality may enhance their menopause-specific quality of life.  相似文献   
109.
  1. Download : Download high-res image (230KB)
  2. Download : Download full-size image
  相似文献   
110.
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