全文获取类型
收费全文 | 6644篇 |
免费 | 490篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 201篇 |
妇产科学 | 143篇 |
基础医学 | 915篇 |
口腔科学 | 58篇 |
临床医学 | 885篇 |
内科学 | 1137篇 |
皮肤病学 | 101篇 |
神经病学 | 661篇 |
特种医学 | 221篇 |
外科学 | 621篇 |
综合类 | 94篇 |
一般理论 | 12篇 |
预防医学 | 892篇 |
眼科学 | 206篇 |
药学 | 634篇 |
中国医学 | 7篇 |
肿瘤学 | 321篇 |
出版年
2023年 | 80篇 |
2022年 | 113篇 |
2021年 | 176篇 |
2020年 | 126篇 |
2019年 | 203篇 |
2018年 | 166篇 |
2017年 | 140篇 |
2016年 | 166篇 |
2015年 | 178篇 |
2014年 | 204篇 |
2013年 | 330篇 |
2012年 | 480篇 |
2011年 | 484篇 |
2010年 | 279篇 |
2009年 | 245篇 |
2008年 | 392篇 |
2007年 | 409篇 |
2006年 | 415篇 |
2005年 | 390篇 |
2004年 | 341篇 |
2003年 | 326篇 |
2002年 | 303篇 |
2001年 | 87篇 |
2000年 | 90篇 |
1999年 | 88篇 |
1998年 | 52篇 |
1997年 | 51篇 |
1996年 | 50篇 |
1995年 | 56篇 |
1994年 | 32篇 |
1993年 | 46篇 |
1992年 | 38篇 |
1991年 | 39篇 |
1990年 | 24篇 |
1989年 | 30篇 |
1988年 | 28篇 |
1987年 | 22篇 |
1986年 | 24篇 |
1985年 | 28篇 |
1984年 | 16篇 |
1983年 | 19篇 |
1981年 | 15篇 |
1979年 | 18篇 |
1959年 | 19篇 |
1958年 | 30篇 |
1957年 | 29篇 |
1956年 | 36篇 |
1955年 | 24篇 |
1954年 | 30篇 |
1948年 | 29篇 |
排序方式: 共有7142条查询结果,搜索用时 15 毫秒
101.
102.
IntroductionIn clinical trials of the efficacy of manualtreatm ents like surgery or acupuncture,control groups are comm only given‘sham’procedures.Sham procedures,inorder to be true placebos,must be 1) in-distinguishable from the real treatm entand 2 ) inactive.In acupuncture trials,various controls for the process of insert-ing a needle and stimulating it have beenused.These include needling off point orat inappropriate points[1 ,2 ] ,pricking orscratching with blunt needle[3,4 ] ,needlingw… 相似文献
103.
104.
105.
Higher fat and energy intakes confer a survival advantage in cystic fibrosis (CF). There is a need to develop effective nutrition programmes that ensure optimal energy intake in CF.
A cross-sectional measurement of clinical characteristics and energy and fat intakes in patients attending the CF outpatients clinic of the John Hunter Hospital, Newcastle was undertaken. Twenty-nine subjects, mean age 12 years (range 4.3–20.2), completed weighed food records to determine the contribution of fat to the percentage of the recommended energy intake obtained and to document use of pancreatic enzyme replacement therapy.
Diets with a high percentage of energy derived from fat did not guarantee that individuals with CF met their energy requirements. Subjects with total fat intakes of 100 g per day or greater, however, achieved in excess of 110% recommended daily intake (RDI) for energy. Up to 47% of subjects consumed more pancreatic enzyme replacement capsules than shown to give maximum effectiveness.
Setting a 100 g daily fat target is a realistic way of ensuring high energy intakes in CF. Fat ready reckoners would identify the fat content of food and prescribe specific numbers of pancreatic enzyme replacement capsules to be consumed with each meal or food item. 相似文献
Methodology:
A cross-sectional measurement of clinical characteristics and energy and fat intakes in patients attending the CF outpatients clinic of the John Hunter Hospital, Newcastle was undertaken. Twenty-nine subjects, mean age 12 years (range 4.3–20.2), completed weighed food records to determine the contribution of fat to the percentage of the recommended energy intake obtained and to document use of pancreatic enzyme replacement therapy.
Results:
Diets with a high percentage of energy derived from fat did not guarantee that individuals with CF met their energy requirements. Subjects with total fat intakes of 100 g per day or greater, however, achieved in excess of 110% recommended daily intake (RDI) for energy. Up to 47% of subjects consumed more pancreatic enzyme replacement capsules than shown to give maximum effectiveness.
Conclusion:
Setting a 100 g daily fat target is a realistic way of ensuring high energy intakes in CF. Fat ready reckoners would identify the fat content of food and prescribe specific numbers of pancreatic enzyme replacement capsules to be consumed with each meal or food item. 相似文献
106.
Clare Wilding Esther May Eimear Muir-Cochrane 《Australian Occupational Therapy Journal》2005,52(1):2-9
Background and Aim: This article provides an overview of a phenomenological investigation of spirituality with six people who have experienced mental illness. The study aimed to gain a greater understanding of the phenomenon of spirituality and its relationships to occupation and the experience of mental illness.
Methods and Results: Participants were interviewed and the interviews were audiotaped and transcribed verbatim. Findings emerged through multiple readings and gradually constructed meanings from the data. Spirituality was found to be: unique to each participant, a journey through life, vitally important to participants, manifested as 'spiritual occupations', the foundation of meaningful doing, important socially as well as individually, and was found to support participants in coping with mental illness. This article focuses on the 'meta', integrative theme of spirituality as life sustaining. It concludes with the notion that spirituality is essential to the participants and is a significant aspect of their occupational behaviour.
Conclusion: It is recommended that occupational therapists give themselves a 'licence' to discuss spirituality in practice and that they commit to learning more about how spirituality is a part of the lives of their clients. 相似文献
Methods and Results: Participants were interviewed and the interviews were audiotaped and transcribed verbatim. Findings emerged through multiple readings and gradually constructed meanings from the data. Spirituality was found to be: unique to each participant, a journey through life, vitally important to participants, manifested as 'spiritual occupations', the foundation of meaningful doing, important socially as well as individually, and was found to support participants in coping with mental illness. This article focuses on the 'meta', integrative theme of spirituality as life sustaining. It concludes with the notion that spirituality is essential to the participants and is a significant aspect of their occupational behaviour.
Conclusion: It is recommended that occupational therapists give themselves a 'licence' to discuss spirituality in practice and that they commit to learning more about how spirituality is a part of the lives of their clients. 相似文献
107.
We hypothesize that diabetic contact lens wearers may represent a special group displaying higher levels of compliance with their lens care regimens as a result of learned behaviour relating to maintenance of their diabetic condition. To test this hypothesis, a prospective, single centre, controlled, masked study was performed whereby 29 diabetic contact lens patients and 29 non-diabetic control subjects were issued with disposable hydrogel contact lenses and a multipurpose lens care regimen. All participants were given identical instruction on lens care and maintenance. Compliance levels were assessed at a 12-month aftercare appointment by demonstration and questionnaire. Twenty-four different aspects of compliance were scored, 12 by observation and 12 by questionnaire report, of which only two showed a significant difference between the diabetic and control groups. Although the combined population of contact lens wearers was generally compliant, there were examples of non-compliance in both groups. Neither the duration of diabetes nor the degree of metabolic control appeared to have a significant effect on compliance. The results suggest that eye care practitioners cannot assume that diabetic patients will be more compliant with contact lens care and maintenance than non-diabetic patients. 相似文献
108.
Chen YH Dale TJ Romanos MA Whitaker WR Xie XM Clare JJ 《The European journal of neuroscience》2000,12(12):4281-4289
The type III voltage-gated sodium channel was cloned from human brain. The full-length cDNA has 89% identity with rat type III, and the predicted protein (1951 amino acids) has 55 differences. The expression pattern of human type III mRNA was determined in adult brain tissue and, in contrast to rat, was detected in many regions, including caudate nucleus, cerebellum, hippocampus and frontal lobe. The human type III channel was stably expressed in Chinese hamster ovary (CHO) cells and its biophysical properties compared to the human type II channel using identical conditions. The voltage dependence and kinetics of activation were found to be similar to that of type II. The kinetics of inactivation of the two human subtypes were also similar. However, type III channels inactivated at more hyperpolarized potentials and were slower to recover from inactivation than type II. When expressed in human embryonic kidney (HEK293T) cells, type III channels produced currents with a prominent persistent component, which were similar to those reported for rat type II [Ma et al. (1997) Neuron, 19, 443-452]. However, unlike type II, this was prominent even in the absence of coexpressed G-proteins, suggesting type III may adopt this gating mode more readily. The distinct properties of the channel, together with its wide distribution in adult brain, suggest that in humans, type III may have important physiological roles under normal, and perhaps also pathological conditions. 相似文献
109.
110.