全文获取类型
收费全文 | 217646篇 |
免费 | 3620篇 |
国内免费 | 259篇 |
专业分类
耳鼻咽喉 | 1501篇 |
儿科学 | 7871篇 |
妇产科学 | 4164篇 |
基础医学 | 22100篇 |
口腔科学 | 2458篇 |
临床医学 | 16633篇 |
内科学 | 40045篇 |
皮肤病学 | 1529篇 |
神经病学 | 20920篇 |
特种医学 | 10243篇 |
外科学 | 34352篇 |
综合类 | 2478篇 |
一般理论 | 19篇 |
预防医学 | 21189篇 |
眼科学 | 3461篇 |
药学 | 12077篇 |
1篇 | |
中国医学 | 709篇 |
肿瘤学 | 19775篇 |
出版年
2024年 | 71篇 |
2023年 | 520篇 |
2022年 | 1003篇 |
2021年 | 1806篇 |
2020年 | 1061篇 |
2019年 | 1498篇 |
2018年 | 23334篇 |
2017年 | 18329篇 |
2016年 | 20587篇 |
2015年 | 2412篇 |
2014年 | 2883篇 |
2013年 | 3355篇 |
2012年 | 10710篇 |
2011年 | 24615篇 |
2010年 | 20578篇 |
2009年 | 13183篇 |
2008年 | 22354篇 |
2007年 | 24418篇 |
2006年 | 3156篇 |
2005年 | 4748篇 |
2004年 | 5509篇 |
2003年 | 6229篇 |
2002年 | 4162篇 |
2001年 | 479篇 |
2000年 | 553篇 |
1999年 | 385篇 |
1998年 | 489篇 |
1997年 | 419篇 |
1996年 | 286篇 |
1995年 | 276篇 |
1994年 | 250篇 |
1993年 | 179篇 |
1992年 | 124篇 |
1991年 | 162篇 |
1990年 | 193篇 |
1989年 | 117篇 |
1988年 | 93篇 |
1987年 | 75篇 |
1986年 | 60篇 |
1985年 | 64篇 |
1984年 | 59篇 |
1983年 | 43篇 |
1982年 | 65篇 |
1980年 | 60篇 |
1974年 | 30篇 |
1938年 | 60篇 |
1937年 | 25篇 |
1934年 | 30篇 |
1932年 | 56篇 |
1930年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
21.
Anthony Spirito Larry Brown James Overholser Gregory Fritz Andrea Bond 《Death Studies》1991,15(3):269-280
The assessment of the medical lethality and intent of suicide attempts has been considered an important area of research for those interested in suicide. The current study examined the usefulness of the Risk-Rescue Rating Scale with 109 adolescent suicide attempters and found a restricted range of variability, which, in turn, resulted in poor interrater reliability on a number of items. Results suggest that the Risk-Rescue Rating Scale is of limited usefulness with adolescents, and alternative approaches to assessing lethality and suicidal intent with this age group are discussed. 相似文献
22.
23.
24.
Introduction Choroid plexus cysts can lead to isolation of the lateral ventricles and distension of the third ventricle. We present an
ultrasonographic video documentation of an infant with variably shaped and localized choroid plexus cyst of the third ventricle.
Case report An infant had periods of increased intracranial pressure with changing dilatation of the first to third ventricle. Cerebral
ultrasonography of the not crying boy demonstrated a choroid plexus cyst limply hanging down from the roof of the third ventricle
to the beginning of the aqueduct of Sylvius. During crying, the cyst prolapsed from the third into left lateral ventricle
and was strangled by the foramen of Monro. Endoscopic cyst fenestration and third ventriculostomy continuously solved the
problem of intermittent hydrocephalus occlusus.
Conclusion Depending not only on localization and size but also on cyst form and cerebrospinal fluid pressure, a single choroid plexus
cyst can cause various obstructions of cerebrospinal fluid pathways. 相似文献
25.
Background
Health service policy in the United Kingdom emphasises the importance of self-care by patients with chronic conditions. Written information for patients about their condition is seen as an important aid to help patients look after themselves. From a discourse analysis perspective written texts such as patient information leaflets do not simply describe the reality of a medical condition and its management but by drawing on some sorts of knowledge and evidence rather than others help construct the reality of that condition. This study explored patient information leaflets on osteoarthritis (OA) to see how OA was constructed and to consider the implications for self-care. 相似文献26.
Isolated pure dislocations of the fifth carpo-metacarpal joint are extremely rare injuries. The dorsal form was described
in mere 12 cases. The diagnosis can be easily missed. The lesion is also often overlooked in the routine diagnostic X-ray.
Lateral and oblique views are important for the recognition of the true extent of the lesion. Treatment of these injures is
still controversial and both closed reduction with percutaneous pinning or open reduction with internal fixation are advocated.
The goal of treatment is early reduction and fixation of the metacarpal. Early diagnosis is the key to success. The aim of
this paper is to review literature and present two new cases. 相似文献
27.
Healthcare information systems (HISs) are often implemented to enhance the quality of care and the degree to which it is patient-centered,
as well as to improve the efficiency and safety of services. However, the outcomes of HIS implementations have not met expectations.
We set out to organize the knowledge gained in qualitative studies performed in association with HIS implementations and to
use this knowledge to outline an updated structure for implementation planning. A multi-disciplinary team performed the analyses
in order to cover as many aspects of the primary studies as possible. We found that merely implementing an HIS will not automatically
increase organizational efficiency. Strategic, tactical, and operational actions have to be taken into consideration, including
management involvement, integration in healthcare workflow, establishing compatibility between software and hardware and,
most importantly, user involvement, education and training. The results should be interpreted as a high-order scheme, and
not a predictive theory. 相似文献
28.
29.
Factors affecting aseptic loosening of 4750 total hip arthroplasties: multivariate survival analysis
Barbara Bordini Susanna Stea Manuela De Clerico Sergio Strazzari Antonio Sasdelli Aldo Toni 《BMC musculoskeletal disorders》2007,8(1):69
Background
Total hip arthroplasty is a successful surgery, that fails at a rate of approximately 10% at ten years from surgery. Causes for failure are mainly aseptic loosening of one or both components partially due to wear of articular surfaces and partially to design. The present analysis aimed to identify risk factors and quantify their effects on aseptic failure. 相似文献30.
Andrea Berger Michelle Sadeh Gabriel Tzur I Avinoam Shuper Liora Kornreich Dov Inbar Ian J Cohen Shalom Michowiz Isaac Yaniv Shlomi Constantini Eli Vakil 《Journal of the International Neuropsychological Society》2005,11(4):482-487
Cerebellar involvement in motor and non-motor sequence learning was examined with serial reaction time tasks (SRT). Our sample consisted of 8 children and adolescents who had undergone surgical removal of a benign posterior fossa tumor (PFT) during childhood. None of them had undergone chemotherapy or cranial radiation therapy (CRT). Ages ranged from 1-11 years at surgery and 9-17 years at testing. The children were tested not earlier than 2.5 years after surgery (M = 5.9 years), enabling brain plasticity and recovery of functions. Their performance was compared with a matched control sample. The PFT group was not impaired in the implicit learning of sequences, as reflected in their performance in blocks with a repeated sequence, both before and after a random block. However, in the perceptual task, their performance deteriorated more than that of the control group when a random block was introduced, suggesting that it was more difficult for the patients to respond flexibly or change their response set when encountering changing task demands. These results are in line with another study by our group on task switching with the same patients. 相似文献