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   1044篇
  免费   82篇
  国内免费   1篇
耳鼻咽喉   4篇
儿科学   75篇
妇产科学   20篇
基础医学   132篇
口腔科学   1篇
临床医学   155篇
内科学   181篇
皮肤病学   12篇
神经病学   99篇
特种医学   33篇
外科学   90篇
综合类   6篇
一般理论   2篇
预防医学   163篇
眼科学   26篇
药学   44篇
中国医学   1篇
肿瘤学   83篇
  2023年   12篇
  2022年   6篇
  2021年   26篇
  2020年   15篇
  2019年   15篇
  2018年   32篇
  2017年   26篇
  2016年   20篇
  2015年   29篇
  2014年   26篇
  2013年   51篇
  2012年   84篇
  2011年   76篇
  2010年   39篇
  2009年   48篇
  2008年   60篇
  2007年   70篇
  2006年   49篇
  2005年   63篇
  2004年   57篇
  2003年   47篇
  2002年   61篇
  2001年   8篇
  2000年   5篇
  1999年   15篇
  1998年   15篇
  1997年   12篇
  1996年   7篇
  1995年   5篇
  1994年   6篇
  1993年   16篇
  1992年   8篇
  1991年   11篇
  1990年   3篇
  1989年   5篇
  1988年   5篇
  1986年   5篇
  1985年   5篇
  1984年   6篇
  1983年   6篇
  1982年   6篇
  1981年   4篇
  1980年   9篇
  1979年   4篇
  1975年   4篇
  1974年   5篇
  1973年   3篇
  1971年   3篇
  1965年   3篇
  1962年   3篇
排序方式: 共有1127条查询结果,搜索用时 31 毫秒
101.
abstract    This paper analyses Muriel's Wedding , a film based on and inspired by the story of 'Cinderella'. Beginning with a discussion of fairy tales, it argues that interpretations of them are theoretically and culturally specific. Bearing this point in mind, Bettelheim's oedipal analysis of 'Cinderella' is compared with an alternative view developed in Muriel's Wedding . Hogan, the film's author and director, posits a different perspective; one where female friendship becomes integral to the psychological development of Muriel. The iconic significance of weddings is also discussed in relation to this. The paper draws on the pre-oedipal theories of Winnicott, and the more recent contributions of analytic feminist and relational theorists. Implicit in this is the contribution that can be made to clinical practice, and the notion there is a dialectical relationship between the fantasies of the inner world and the lived experience of the cultural world.  相似文献   
102.
103.
104.
105.
106.
Traditional setups for in situ MR investigation of skeletal muscle function in animals use invasive systems for muscle stimulation and force measurement. These systems require surgical preparation and therefore exclude repetitive investigations on the same animal. This article describes a new experimental setup allowing strictly noninvasive MR investigations of muscle function in contracting rat gastrocnemius muscle using 1H-MR imaging and 31P-MR spectroscopy. The novelty of this setup is the integration of two noninvasive systems allowing muscle contraction by transcutaneous stimulation and force measurement with a dedicated ergometer. Muscle function was investigated in 20 rats (275-300 g) through a fatiguing stimulation protocol, either with this noninvasive setup (n = 10) or with a traditional MR setup (n = 10). T2-weighted images demonstrated that transcutaneous stimulation activated mainly the gastrocnemius muscle. Moreover, the changes in force development and in energy metabolism obtained with the noninvasive setup were qualitatively and quantitatively similar to those obtained with the traditional setup. This noninvasive setup is thus suitable for investigating skeletal muscle function in situ. It offers the possibility to repeat investigations in the same animal, avoiding individual variability and enabling longitudinal follow-up studies. This opens up new perspectives in various research areas including pharmaceutical research.  相似文献   
107.
Surveillance of group A streptococcal (GAS) infections was undertaken as a major component of the European Commission-funded project on severe GAS disease in Europe (strep-EURO). One aim of strep-EURO was to improve the quality of GAS characterization by standardization of methods. An external quality assurance study (EQA) was therefore carried out to evaluate current global performance. Eleven strep-EURO and seven other streptococcal reference centers received a panel of 20 coded GAS isolates for typing. Conventional phenotypic typing (based on cell surface T and M protein antigens and opacity factor [OF] production) and molecular methods (emm gene typing) were used either as single or combined approaches to GAS typing. T typing was performed by 16 centers; 12 centers found one or more of the 20 strains nontypeable (typeability, 89%), and 11 centers reported at least one incorrect result (concordance, 93%). The 10 centers that tested for OF production achieved 96% concordance. Limited availability of antisera resulted in poor typeability values from the four centers that performed phenotypic M typing (41%), three of which also performed anti-OF typing (typeability, 63%); however, concordance was high for both M (100%) and anti-OF (94%) typing. In contrast, the 15 centers that performed emm gene sequencing achieved excellent typeability (97%) and concordance (98%), although comparison of the performance between centers yielded typeability rates from 65 to 100% and concordance values from 83 to 100%. With the rapid expansion and use of molecular genotypic methods to characterize GAS, continuation of EQA is essential in order to achieve international standardization and comparison of type distributions.  相似文献   
108.
Five agencies providing home health care to indigent populations in New Orleans, Louisiana were evaluated in terms of emergency planning and implementation. This was to help improve response to community disasters for indigent populations. Preparation for Hurricane Katrina was examined looking at interaction with local and state departments of health. It was found that the state dept of health provided leadership in making the emergency plans, but not in implementation. Local departments of health appeared to have very little responsibility in emergency planning. Although every agency had a plan, when it came to implementation there was lack of coordination and breakdown in communication at all government levels. Recommendations for future policy include: 1) early evacuation of special needs patients; 2) improved training of staff to include practice drills; 3) improve communication systems; and, 4) increased funding of state and local departments of health to provide training.  相似文献   
109.
18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) is now an integral part of lymphoma staging and management. Because of its greater accuracy compared with CT alone, PET/CT is currently routinely performed for staging and for response assessment at the end of treatment in the vast majority of FDG-avid lymphomas and is the cornerstone of response classification for these lymphomas according to the Lugano classification. Interim PET/CT, typically performed after 2 to 4 of 6 to 8 chemotherapy/chemoimmunotherapy cycles with or without radiation, is commonly performed for prognostication and potential treatment escalation or de-escalation early in the course of therapy, a concept known as response-adapted or risk-adapted treatment. Quantitative PET is an area of growing interest. Metrics, such as the standardized uptake value, changes (Δ) in the standardized uptake value, metabolic tumor volume, and total lesion glycolysis, are being investigated as more reproducible and potentially more accurate predictors of response and prognosis. Despite the progress made in standardizing the use of PET/CT in lymphoma, challenges remain, particularly with respect to its limited positive predictive value, emphasizing the need for more specific molecular probes. This review highlights the most relevant applications of PET/CT in Hodgkin and B-cell non-Hodgkin lymphoma, its strengths and limitations, as well as recent efforts at implementing PET/CT-based metrics as promising tools for precision medicine.  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