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   8586篇
  免费   857篇
  国内免费   10篇
耳鼻咽喉   80篇
儿科学   283篇
妇产科学   112篇
基础医学   1228篇
口腔科学   169篇
临床医学   1085篇
内科学   1636篇
皮肤病学   158篇
神经病学   745篇
特种医学   459篇
外科学   1188篇
综合类   228篇
一般理论   7篇
预防医学   1140篇
眼科学   112篇
药学   442篇
  1篇
中国医学   9篇
肿瘤学   371篇
  2021年   107篇
  2020年   59篇
  2019年   115篇
  2018年   119篇
  2017年   118篇
  2016年   91篇
  2015年   121篇
  2014年   139篇
  2013年   263篇
  2012年   341篇
  2011年   361篇
  2010年   238篇
  2009年   227篇
  2008年   367篇
  2007年   314篇
  2006年   343篇
  2005年   325篇
  2004年   306篇
  2003年   259篇
  2002年   288篇
  2001年   279篇
  2000年   275篇
  1999年   247篇
  1998年   147篇
  1997年   151篇
  1996年   106篇
  1995年   97篇
  1994年   99篇
  1993年   120篇
  1992年   200篇
  1991年   192篇
  1990年   201篇
  1989年   208篇
  1988年   206篇
  1987年   186篇
  1986年   190篇
  1985年   190篇
  1984年   132篇
  1983年   129篇
  1982年   101篇
  1981年   99篇
  1980年   93篇
  1979年   79篇
  1978年   93篇
  1977年   69篇
  1976年   71篇
  1975年   67篇
  1974年   74篇
  1973年   60篇
  1971年   67篇
排序方式: 共有9453条查询结果,搜索用时 31 毫秒
1.
European Journal of Orthopaedic Surgery & Traumatology - The goals of this study were to compare patient satisfaction and wound-related complications in patients receiving 2-octyl cyanoacrylate...  相似文献   
2.
3.
Purpose of the study: the aim of this study was to synthesize PFC fNIRS outcomes on the effects of cognitive tasks compared to resting/baseline tasks in healthy adults from studies utilizing a pre/post design.

Material and methods: original research studies were searched from seven databases (MEDLINE, EMBASE, CENTRAL, CINAHL, SCOPUS, PEDro and PubMed). Subsequently, two independent reviewers screened the titles and abstracts followed by full-text reviews to assess the studies' eligibility.

Results: eleven studies met the inclusion criteria and had data abstracted and quality assessed. Methodology varied considerably and yet cognitive tasks resulted in the ΔO2Hb increasing in 8 of the 11 and ΔHHb decreasing in 8 of 8 studies that reported this outcome. The cognitive tasks from 10 of the 11 studies were classified as “Working Memory” and “Verbal Fluency Tasks”.

Conclusions: although, the data comparison was challenging provided the heterogeneity in methodology, the results across studies were similar.  相似文献   

4.
5.
Background  Limited research exists on patient knowledge/cognition or “getting inside patients'' heads.” Because patients possess unique and privileged knowledge, clinicians need this information to make patient-centered and coordinated treatment planning decisions. To achieve patient-centered care, we characterize patient knowledge and contributions to the clinical information space. Methods and Objectives  In a theoretical overview, we explore the relevance of patient knowledge to care provision, apply historical perspectives of knowledge acquisition to patient knowledge, propose a representation of patient knowledge types across the continuum of care, and include illustrative vignettes about Mr. Jones. We highlight how the field of human factors (a core competency of health informatics) provides a perspective and methods for eliciting and characterizing patient knowledge. Conclusion  Patients play a vital role in the clinical information space by possessing and sharing unique knowledge relevant to the clinical picture. Without a patient''s contributions, the clinical picture of the patient is incomplete. A human factors perspective informs patient-centered care and health information technology solutions to support clinical information sharing.  相似文献   
6.
BACKGROUND: Presently, complementary and alternative medicine, including both therapies and herbal/oral supplements, is used globally. Few studies have examined the use of specific therapies, separate from herbal/oral supplements, in cardiac rehabilitation. This paper presents a systematic evaluation of current research evidence related to use of specific complementary and alternative medicine therapies in secondary prevention of cardiovascular disease, with a view to making recommendations for cardiac rehabilitation. DESIGN AND METHODS: A literature search was conducted using complementary and alternative medicine websites, Medline, Allied and Complementary Medicine, CINAHL, Cochrane databases, EMBASE, SportDiscus, Clinical Evidence, and Evidence-Based Practice to locate research-based scientific evidence related to the use of complementary and alternative medicine in cardiac rehabilitation. Search keywords included heart, cardiac, cardiovascular, coronary, myocardial and rehabilitation, combined with particular therapies. Herbal/oral supplements were not included in this evaluation. RESULTS: Some complementary and alternative medicine therapies may be useful to patients by themselves or coupled with traditional cardiac rehabilitation. Tai chi, as a complement to existing exercise interventions, can be utilized for low and intermediate risk patients. transcendental meditation may be used as a stress reduction technique. There was insufficient evidence found for the use of acupuncture or chelation therapy in cardiac rehabilitation or secondary prevention. CONCLUSIONS: Some complementary and alternative medicine therapies hold promise for patients in cardiac rehabilitation. Further research is essential, however, in all areas of complementary and alternative medicine to confirm its usefulness as an adjunct to cardiac rehabilitation.  相似文献   
7.
8.
The carpal regions of ten cadaver extremities were imaged by CT. The images were combined into a 3-dimensional model of the carpus using a technique based on a dynamic programming algorithm to find an optimal estimate of the location of the bone boundaries in the CT images. The resulting set of surface points on each bone was used to compute volumes and principal and antipodal axes for the bones. A spatial coordinate system was established based on the positions of the centroids of three bones in the distal carpal row. The angular orientations of all carpal bones were determined with respect to this system. The principal axes for the same bone among ten wrist specimens proved to be more widely dispersed than the antipodal axes for the same bones. The antipodal axes also correspond more closely to an intuitive notion of the “longest axis” of the bones. We conclude that the antipodal axis is a more reliable and useful measure of bone orientation than the principal axis.  相似文献   
9.
The approach to surgery of the crooked nose has changed significantly in the last two decades due in a large measure to a better understanding of the growth, anatomy, and physiology of the nose. The crooked nose often presents a challenging problem to the surgeon because of the multiplicity of deformities. In most cases, deformities of the external bony and cartilaginous nose, septum and turbinates must all be corrected simultaneously in order to obtain a satisfactory and lasting restoration of the nasal airway as well as of the external nasal configuration.  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