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   694篇
  免费   26篇
耳鼻咽喉   1篇
儿科学   33篇
妇产科学   7篇
基础医学   78篇
口腔科学   41篇
临床医学   64篇
内科学   66篇
皮肤病学   4篇
神经病学   56篇
特种医学   82篇
外科学   128篇
综合类   4篇
预防医学   43篇
眼科学   2篇
药学   35篇
中国医学   1篇
肿瘤学   75篇
  2023年   4篇
  2021年   12篇
  2020年   5篇
  2019年   20篇
  2018年   19篇
  2017年   15篇
  2016年   16篇
  2015年   14篇
  2014年   24篇
  2013年   30篇
  2012年   41篇
  2011年   40篇
  2010年   21篇
  2009年   13篇
  2008年   33篇
  2007年   33篇
  2006年   26篇
  2005年   23篇
  2004年   31篇
  2003年   30篇
  2002年   29篇
  2001年   20篇
  2000年   9篇
  1999年   16篇
  1998年   8篇
  1997年   5篇
  1995年   3篇
  1994年   4篇
  1993年   10篇
  1992年   11篇
  1991年   14篇
  1990年   12篇
  1989年   14篇
  1988年   6篇
  1987年   6篇
  1986年   15篇
  1985年   10篇
  1984年   11篇
  1983年   8篇
  1982年   6篇
  1980年   6篇
  1979年   7篇
  1978年   5篇
  1977年   7篇
  1976年   5篇
  1975年   2篇
  1974年   4篇
  1971年   2篇
  1970年   3篇
  1968年   5篇
排序方式: 共有720条查询结果,搜索用时 31 毫秒
1.
A theoretical model of prevention addressing adolescents at-risk of offending was developed then utilised to assess a primary and secondary prevention program. The study of the wilderness-based practise was conducted between September 1992 and October 1994, adopting a pre-post-follow-up quasi-experimental design using waiting periods to establish treatment and control groups. Maturational changes were gauged over a 12 month period of 44 male and 18 female voluntary Australian adolescents between the ages of 15 and 25 years. Significant differences between the treatment and control groups in the psychometric areas of general self-esteem and self-actualisation were found establishing positive program effect on participants. Further, the long term effect of this program in preventing participants initial contact with court proceedings or reducing further involvement respectively, over a twelve month period was substantiated. It was shown that following this experience post program goals of employment and education for adolescents at-risk were positively influenced.  相似文献   
2.

Background  

January 1, 2002, copayment for outpatient female sterilization in Norwegian public hospitals increased from 33 euros to 750 euros after a revision of the health care system. The aim of the present study was to investigate the effect of the new copayment system on female sterilization epidemiology.  相似文献   
3.
PurposeThe purpose of this study was for an international panel of experts to establish consensus indications for distal rectus femoris surgery in children with cerebral palsy (CP) using a modified Delphi method.MethodsThe panel used a five-level Likert scale to record agreement or disagreement with 33 statements regarding distal rectus femoris surgery. The panel responded to statements regarding general characteristics, clinical indications, computerized gait data, intraoperative techniques and outcome measures. Consensus was defined as at least 80% of responses being in the highest or lowest two of the five Likert ratings, and general agreement as 60% to 79% falling into the highest or lowest two ratings. There was no agreement if neither threshold was reached.ResultsConsensus or general agreement was reached for 17 of 33 statements (52%). There was general consensus that distal rectus femoris surgery is better for stiff knee gait than is proximal rectus femoris release. There was no consensus about whether the results of distal rectus femoris release were comparable to those following distal rectus femoris transfer. Gross Motor Function Classification System (GMFCS) level was an important factor for the panel, with the best outcomes expected in children functioning at GMFCS levels I and II. The panel also reached consensus that they do distal rectus femoris surgery less frequently than earlier in their careers, in large part reflecting the narrowing of indications for this surgery over the last decade.ConclusionThis study can help paediatric orthopaedic surgeons optimize decision-making for, and outcomes of, distal rectus femoris surgery in children with CP.Level of evidenceV  相似文献   
4.
5.
Particle exposure has traditionally been monitored as mass concentration of PM10 (particles with an aerodynamic diameter less than 10 microm), more recently also as PM2.5. The mass concentration is strongly influenced by the large particles. Therefore, particle mass is a poor measure for characterizing the amount of the small, possibly more biologically potent particles. We used polystyrene particles (PSP) ranging in diameter from 0.0588 to 11.14 microm, carbon black (CB), and diesel exhaust particles (DEP), to study the adjuvant effect of particles on the immune response to the allergen ovalbumin (OVA) after sc injection into the footpad of BALB/cA mice. At a given mass dose, the small particles (0.0588 and 0.202 microm PSP, CB, and DEP) increased the allergen-specific IgE serum levels to a substantially higher degree than the larger particles (1.053, 4.64, and 11.14 microm PSP). Further, in the draining lymph node during the primary response, the fine particles (0.202 microm) with OVA increased cell numbers, expression of surface markers (CD19, MHC class II, CD86, and CD23) and ex vivo production of IL-4 and IL-10, whereas the largest (11.14 microm) particles did not. Linear regression analyses indicated that the IgE response was not predicted by particle mass (R2 = 0.06), but was predicted by the total particle surface area (R2 = 0.64), number of particles (R2 = 0.62), and particle diameter (R2 = 0.58). In conclusion, we found that fine particles exerted stronger adjuvant effects on allergic responses than larger particles at equal mass doses. Consequently, the dose described as total particle surface area or particle number predicts the adjuvant effect of particles better than the currently used particle mass.  相似文献   
6.
7.
8.
The purpose of this article is to broaden the understandinfg of the hermeneutic reading of classic texts. The aim is to show how the choice of a specific scientific tradition in conjunction with a methodological approach creates the foundation that clarifies the actual realization of the reading. This hermeneutic reading of classic texts is inspired by Gadamer's notion that it is the researcher's own research tradition and a clearly formulated theoretical fundamental order that shape the researcher's attitude towards texts and create the starting point that guides all reading, uncovering and interpretation. The researcher's ethical position originates in a will to openness towards what is different in the text and which constantly sets the researcher's preunderstanding and research tradition in movement. It is the researcher's attitude towards the text that allows the text to address, touch and arouse wonder. Through a flexible, lingering and repeated reading of classic texts, what is different emerges with a timeless value. The reading of classic texts is an act that may rediscover and create understanding for essential dimensions and of human beings' reality on a deeper level. The hermeneutic reading of classic texts thus brings to light constantly new possibilities of uncovering for a new envisioning and interpretation for a new understanding of the essential concepts and phenomena within caring science.  相似文献   
9.
10.

Background

There is a large variation in referral rates to secondary care among GPs, which is partly unexplained.

Aim

To explore associations between reasons for referral to secondary care and patient, GP, and healthcare characteristics.

Design and setting

A cross-sectional study in Northern Norway.

Method

Data were derived from 44 (42%) of 104 randomly selected GPs between 2008 and 2010. GPs scored the relevance of nine predefined reasons for 595 referrals from 4350 consecutive consultations on a four-level categorical scale. Associations were examined by multivariable ordered and multivariable multilevel logistic regression analyses.

Results

Medical necessity was assessed as a relevant reason in 93% of the referrals, 43.7% by patient preference, 27.5% to avoid overlooking anything, and 14.6% to reassure the patient. The higher the referral rates, the more frequently the GPs referred to avoid overlooking anything. Female GPs referred to reassure the patient and due to perceived deficient medical knowledge significantly more often than male GPs. However, perceived easy accessibility of specialists was significantly less frequently given as a reason for referral by female GPs compared with male GPs. When the GPs scored the referrals to be of lesser medical necessity, male GPs referred significantly more frequently than female GPs to reassure the patient due to patient preference and perceived deficient medical knowledge.

Conclusion

There are striking differences in reasons for referral between Norwegian male and female GPs and between GPs with high and low referral rates, which reflects difficulties in handling professional uncertainty. Referring to reassure the patients, especially when referrals are less medically necessary, may reflect consideration and acquiescence towards the patients.  相似文献   
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