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   50488篇
  免费   2166篇
  国内免费   180篇
耳鼻咽喉   151篇
儿科学   1406篇
妇产科学   738篇
基础医学   2827篇
口腔科学   733篇
临床医学   8480篇
内科学   6153篇
皮肤病学   403篇
神经病学   1785篇
特种医学   507篇
外科学   2840篇
综合类   5328篇
现状与发展   1篇
一般理论   4篇
预防医学   16873篇
眼科学   229篇
药学   2728篇
  29篇
中国医学   651篇
肿瘤学   968篇
  2024年   61篇
  2023年   1007篇
  2022年   1932篇
  2021年   2604篇
  2020年   2388篇
  2019年   3406篇
  2018年   2978篇
  2017年   1897篇
  2016年   1347篇
  2015年   1534篇
  2014年   3830篇
  2013年   3671篇
  2012年   3345篇
  2011年   3638篇
  2010年   2767篇
  2009年   2404篇
  2008年   2175篇
  2007年   2020篇
  2006年   1541篇
  2005年   1011篇
  2004年   821篇
  2003年   639篇
  2002年   528篇
  2001年   451篇
  2000年   378篇
  1999年   338篇
  1998年   268篇
  1997年   202篇
  1996年   116篇
  1995年   131篇
  1994年   95篇
  1993年   95篇
  1992年   77篇
  1991年   48篇
  1990年   39篇
  1989年   34篇
  1988年   30篇
  1985年   282篇
  1984年   402篇
  1983年   317篇
  1982年   327篇
  1981年   311篇
  1980年   253篇
  1979年   239篇
  1978年   208篇
  1977年   156篇
  1976年   139篇
  1975年   120篇
  1974年   104篇
  1973年   80篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Whose values matter when considering which environment is healthier for a child whose guardianship is contested? The biological mother from a remote Australian Aboriginal community, who voluntarily relinquished her but has now requested her return? The foster mother who has cared for her in a metropolitan centre in another State of Australia, thousands of kilometres away? The welfare professionals who also live in that city? Or the child herself, who left her birth home and community five years earlier at the age of two? Drawing on a case study of a seven-year old Aboriginal girl, the authors argue that non-Indigenous values trumped Indigenous values without the realisation of key players who were empowered to make such determinations. The article uses Manuel DeLanda's neo-assemblage theory to consider the range of processes that exert themselves to shape place-values and social identity in colonised nations. It will also draw on Erik Erikson's and Lev Vygotsky's theories of psychosocial development to consider competing sets of values that raised feelings of dissonance within the child. Beliefs about what makes a place health-giving are revealed to be complex in colonised nations. Despite policy and legislative changes to better support Aboriginal people and their right to difference, non-Indigenous professionals can continue to be driven by an unrecognised systemic racism. While place-values are not, of course, the only (or perhaps even the most significant) consideration in guardianship determinations, this article will argue they can play a significant and covert role.  相似文献   
4.
BackgroundThe goal of this study was to characterize contemporary performance benchmarks and risk factors associated with negative appendectomy (NA) in children with suspected appendicitis.MethodsA multicenter retrospective cohort analysis of children undergoing appendectomy for suspected appendicitis was performed using data from the 2016–2021 NSQIP-Pediatric Appendectomy Targeted Public Use Files. Multivariable regression was used to evaluate the influence of year, age, sex, and WBC count on NA rate, and to generate rate estimates for NA based on different combinations of demographic characteristics and WBC profiles.Results100,322 patients were included from 140 hospitals. The overall NA rate was 2.4%, and rates decreased significantly during the study period (2016: 3.1% vs. 2021: 2.3%, p < 0.001). In adjusted analyses, the highest risk for NA was associated with a normal WBC (<9000/mm3; OR 5.31 [95% CI: 4.87–5.80]), followed by female sex (OR 1.55 [95% CI: 1.42–1.68]) and age <5 years (OR 1.64 [95% CI 1.39, 1.94]). Model-estimated risk for NA varied significantly across demographic and WBC strata, with a 14.4-fold range in rates between subgroups with the lowest and highest predicted risk (males 13–17 years with elevated WBC [1.1%] vs. females 3–4 years with normal WBC [15.8%]).ConclusionsContemporary NA rates have decreased over time, however NA risk remains high in children without a leukocytosis, particularly for girls and children <5 years of age. These data provide contemporary performance benchmarks for NA in children with suspected appendicitis and identify high-risk populations where further efforts to mitigate NA risk should be targeted.Level of EvidenceIII.  相似文献   
5.
ObjectivesOsteopathy is regulated as an independent healthcare profession in Portugal. The Osteopathic Practitioners Estimates and RAtes (OPERA) project was developed as a survey to profile the osteopathic profession. This study aimed to describe the characteristics of Portuguese osteopathic practitioners.MethodsA voluntary online-based survey was distributed across Portugal between February and June 2020. The survey, composed of 52 questions and seven sections, was formally translated from English to Portuguese and adapted from the original version. Two pilot tests evaluated cultural adaptation and reproducibility. Adult, self-defined osteopaths working in Portugal were eligible. Recruitment of participants was performed through social media and an e-based campaign.ResultsA total of 222 osteopaths participated in the study, 143 were male (64%), aging between 30 and 39 years (42%), mainly working in Lisbon (30%). Most respondents had preliminary healthcare training (68%), mainly as massage therapists. The majority of respondents were self-employed (83%), owner of a clinic (55%) and working alone (59%). The median number of consultations per week was 21–25 and respondents scheduled 46–60 min for each consultation. The majority of patients seek care for lumbar (52%), cervical (38%) and upper spine (38%) complaints. Although most respondents experience a strong osteopathic identity, they do not advertise themselves exclusively as osteopaths.ConclusionsThis study represents the first nationwide document to determine osteopaths' characteristics in Portugal. The study results provide a basis for future surveys that will include cohorts with higher levels of education, as well as findings from other European countries.  相似文献   
6.
7.
目的 根据乳腺癌内分泌治疗患者的症状特征,编制适用于我国乳腺癌内分泌治疗患者的症状评估量表,并检验其信效度。方法 在文献回顾及参照现有症状评估量表的基础上编制量表初始条目池;通过2轮德尔菲专家函询,形成初始版量表;通过对11例患者的认知性访谈,对量表条目进一步修订,形成临床测试版量表。便利选取2020年7月—9月在浙江省某三级甲等肿瘤医院门诊或住院的325例乳腺癌内分泌治疗患者进行问卷调查,检验量表信效度。 结果 形成的最终版乳腺癌内分泌治疗患者症状评估量表包括33个条目,探索性因子分析提取7个公因子,累计方差贡献率为68.76%;各条目内容效度指数为0.78~1.00,量表内容效度指数为0.91;内在相关性检验结果显示,量表各维度与总量表相关系数为0.58~0.79(P<0.05);维度间相关系数为0.26~0.52(P<0.05);总量表Cronbach’s α系数为0.94,重测信度为0.95,折半信度为0.84。结论 编制的乳腺癌内分泌治疗患者症状评估量表具有良好的信效度,适用于相关人群的症状测评。  相似文献   
8.
9.
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