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   3582篇
  免费   312篇
  国内免费   5篇
耳鼻咽喉   47篇
儿科学   139篇
妇产科学   49篇
基础医学   482篇
口腔科学   50篇
临床医学   519篇
内科学   538篇
皮肤病学   115篇
神经病学   481篇
特种医学   197篇
外国民族医学   1篇
外科学   397篇
综合类   33篇
预防医学   425篇
眼科学   33篇
药学   206篇
肿瘤学   187篇
  2023年   40篇
  2022年   52篇
  2021年   109篇
  2020年   76篇
  2019年   123篇
  2018年   112篇
  2017年   101篇
  2016年   87篇
  2015年   108篇
  2014年   129篇
  2013年   179篇
  2012年   261篇
  2011年   214篇
  2010年   111篇
  2009年   89篇
  2008年   180篇
  2007年   133篇
  2006年   155篇
  2005年   125篇
  2004年   135篇
  2003年   120篇
  2002年   132篇
  2001年   71篇
  2000年   74篇
  1999年   61篇
  1998年   28篇
  1997年   23篇
  1996年   25篇
  1995年   24篇
  1994年   18篇
  1993年   19篇
  1992年   43篇
  1991年   50篇
  1990年   55篇
  1989年   40篇
  1988年   39篇
  1987年   40篇
  1986年   38篇
  1985年   29篇
  1984年   33篇
  1983年   27篇
  1982年   29篇
  1981年   20篇
  1980年   19篇
  1979年   26篇
  1978年   20篇
  1976年   17篇
  1975年   23篇
  1974年   22篇
  1973年   24篇
排序方式: 共有3899条查询结果,搜索用时 15 毫秒
71.
Background: Contemporary neuropsychological studies suggest that cerebellar lesions may impact upon higher‐level cognitive functioning via mechanisms of crossed cerebello‐cerebral diaschisis. Accordingly, right cerebellar lesions have been previously associated with linguistic impairments such as reduced word fluency and agrammatic output. Recently, however, neuroimaging investigations have also identified ipsilateral cerebral hypoperfusion as a consequence of cerebellar lesions, implicating a potential role for the left cerebellum in the mediation of language processes. Aims: The purpose of this research was to investigate the effects of left cerebellar lesions of vascular origin, on general as well as high‐level language skills. Methods & Procedures: Linguistic profiles were compiled for five individuals with left primary cerebellar lesions utilising a comprehensive language test battery. Individual scores relevant to each subtest were compared to a group of non‐neurologically impaired controls. The criterion for anomalous performance was established as ≥ 1.5 SD below the mean of the control group. Outcomes & Results: The findings of this research suggest that higher‐level language deficits may result from left primary cerebellar lesions. All participants demonstrated deficits on measures of word fluency, sentence construction within a set context, producing word definitions, and producing multiple definitions for the same word. Deficits were also noted for several participants on measures of understanding figurative language, forming word associations, identifying and correcting semantic absurdities, and producing synonyms and antonyms. Conclusions: The results presented challenge the notion of a lateralised linguistic cerebellum, supporting a potential role for the left as well as right cerebellar hemispheres in the regulation of language processes, presumably via cerebellar‐basal ganglia/thalamo‐cortical pathways.  相似文献   
72.
The Carleton University Responsiveness to Suggestion Scale (CURSS) of Spanos, Radtke, Hodgins, Bertrand 3 and Stam and Spanos, Radtke, Hodgins, Stam, and Bertrand (1983) was individually administered to a sample of 61 facial pain patients. The mean scores on the 3 CURSS suggestibility dimensions were higher than those of the college student norms. As in previous studies using the CURSS, however, objective scores were smaller when experienced involuntariness was taken into account. Observer scores of overt responses were highly related to self-scores of overt responses. The CURSS also proved a good predictor of reductions in clinical pain following a psychologically based treatment program.  相似文献   
73.
74.
75.

Background

A timely return to competitive sport is a primary goal of anterior cruciate ligament reconstruction (ACLR). It is not known whether an accelerated return to sport increases the risk of early-onset knee osteoarthritis (KOA).

Objective

To determine whether an accelerated return to sport post-ACLR (ie, <10 months) is associated with increased odds of early KOA features on magnetic resonance imaging (MRI) 1 year after surgery and to evaluate the relationship between an accelerated return to sport and early KOA features stratified by type of ACL injury (isolated or concurrent chondral/meniscal injury) and lower limb function (good or poor).

Design

Cross-sectional study.

Setting

Private radiology clinic and university laboratory.

Participants

A total of 111 participants (71 male; mean age 30 ± 8 years) 1-year post-ACLR.

Methods

Participants completed a self-report questionnaire regarding postoperative return-to-sport data (specific sport, postoperative month first returned), and isotropic 3-T MRI scans were obtained.

Outcome Measures

Early KOA features (bone marrow, cartilage and meniscal lesions, and osteophytes) assessed with the MRI OA Knee Score. Logistic regression analyses evaluated the odds of early KOA features with an accelerated return to sport (<10 months post-ACLR versus ≥10 months or no return to sport) in the total cohort and stratified by type of ACL injury and lower limb function.

Results

Forty-six (41%) participants returned to competitive sport <10 months post-ACLR. An early return to sport was associated with significantly increased odds of bone marrow lesions (odds ratio [OR] 2.7, 95% confidence interval [CI] 1.3-6.0) but not cartilage (OR 1.2, 95% CI 0.5-2.6) or meniscal lesions (OR 0.8, 95% CI 0.4-1.8) or osteophytes (OR 0.6, 95% CI 0.3-1.4). In those with poor lower limb function, early return to sport exacerbated the odds of bone marrow lesions (OR 4.6, 95% CI 1.6-13.5), whereas stratified analyses for type of ACL injury did not reach statistical significance.

Conclusion

An accelerated return to sport, particularly in the presence of poor lower limb function, may be implicated in posttraumatic KOA development.

Level of evidence

IV  相似文献   
76.
The aim of this study was to compare the influence of two different instructional climates on the accumulation of moderate-to-vigorous physical activity (MVPA) during a fully-inclusive adapted recreational physical activity program. A total of 32 children (18 typically-developing (TD), and 14 with developmental disabilities (DD) ranging in ages from 5 to 9 years, participated in six, 60-min adapted recreational sessions. Of those six sessions, three incorporated an autonomy-supportive climate (high autonomy), and three incorporated direct instruction (low autonomy). MVPA was measured using accelerometers. A repeated measures ANOVA was conducted to determine significant differences in MVPA between group (TD/DD), climate (autonomy/direct), and a group x climate interaction. Significant group and climate main effects were observed (p?=?0.002 and 0.014, respectively). However, there was not a significant group x climate interaction (p?=?0.313). These results suggest that although the group of children with disabilities spent less time in MVPA compared to their typically-developing peers, all participants spent more time in MVPA for the autonomy-supportive climate compared to the low-autonomous climate. This study is the first to quantitatively assess the efficacy of a fully-inclusive autonomy-supportive climate on physical activity levels in children with and without developmental disabilities.  相似文献   
77.
Negative perceptions or underdeveloped understanding of healthcare team member roles can impact the functionality of the team and stunt innovations in interprofessional practice and education. Therefore, the intent of this study was to explore the perception of pharmacists’ role on the healthcare team by future team members: prospective health professional students. The study utilised a survey to examine these perceptions in prospective health professional students (n = 34) nearing the application process to health professional school. A coding process was used to explore open-ended text responses through a line-by-line analysis and identify emerging themes regarding perception of pharmacists’ roles, responsibilities, and practice settings. Quantitative data examined perception of pharmacists by intended prospective profession, healthcare experience, and pharmacy experience. Results indicate that while prospective health professional students find pharmacists to be an important part of the healthcare team, they lack a developed understanding of pharmacists’ roles, responsibilities, and practice settings. Identifying and addressing prospective health professional students’ misperceptions surrounding pharmacists’ roles and responsibilities may encourage them to make informed career decisions and shape them into more knowledgeable future professionals with the ability to better impact patient care on interprofessional teams.  相似文献   
78.
79.
80.
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