全文获取类型
收费全文 | 92040篇 |
免费 | 6524篇 |
国内免费 | 2462篇 |
专业分类
耳鼻咽喉 | 3448篇 |
儿科学 | 1055篇 |
妇产科学 | 1566篇 |
基础医学 | 2668篇 |
口腔科学 | 3669篇 |
临床医学 | 13438篇 |
内科学 | 8865篇 |
皮肤病学 | 739篇 |
神经病学 | 3934篇 |
特种医学 | 1651篇 |
外国民族医学 | 22篇 |
外科学 | 27541篇 |
综合类 | 11874篇 |
现状与发展 | 6篇 |
一般理论 | 2篇 |
预防医学 | 4381篇 |
眼科学 | 4811篇 |
药学 | 3741篇 |
243篇 | |
中国医学 | 1564篇 |
肿瘤学 | 5808篇 |
出版年
2024年 | 342篇 |
2023年 | 2435篇 |
2022年 | 3918篇 |
2021年 | 5213篇 |
2020年 | 5126篇 |
2019年 | 4331篇 |
2018年 | 4137篇 |
2017年 | 3659篇 |
2016年 | 3584篇 |
2015年 | 3559篇 |
2014年 | 6999篇 |
2013年 | 7232篇 |
2012年 | 5236篇 |
2011年 | 5450篇 |
2010年 | 4378篇 |
2009年 | 4009篇 |
2008年 | 3903篇 |
2007年 | 3959篇 |
2006年 | 3422篇 |
2005年 | 2929篇 |
2004年 | 2515篇 |
2003年 | 2116篇 |
2002年 | 1671篇 |
2001年 | 1582篇 |
2000年 | 1332篇 |
1999年 | 1190篇 |
1998年 | 957篇 |
1997年 | 911篇 |
1996年 | 681篇 |
1995年 | 575篇 |
1994年 | 509篇 |
1993年 | 409篇 |
1992年 | 367篇 |
1991年 | 350篇 |
1990年 | 222篇 |
1989年 | 217篇 |
1988年 | 220篇 |
1987年 | 209篇 |
1986年 | 171篇 |
1985年 | 192篇 |
1984年 | 170篇 |
1983年 | 112篇 |
1982年 | 130篇 |
1981年 | 112篇 |
1980年 | 82篇 |
1979年 | 52篇 |
1978年 | 38篇 |
1977年 | 35篇 |
1976年 | 30篇 |
1975年 | 23篇 |
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
81.
Alberto Salinas M.D. Harry M. Salinas B.Sc. Edwin Santiago Ph.D. Wilfredo García M.D. Queta Ferro R.D. Mariemma Antor M.Sc. 《Surgery for obesity and related diseases》2009,5(4):455-458
BackgroundSilastic ring vertical gastric bypass (SRVGB) with jejunal interposition is our standard operation for morbidly obese patients. We present the results of 5 years of follow-up in a cohort of patients who underwent SRVGB in 2001.MethodsThe records of all 160 consecutive patients who underwent SRVGB from January to December 2001 were reviewed. Of the 160 procedures, 143 were primary open cases, 14 were revisions from restrictive procedures, and 3 were laparoscopic cases. At 5 years, the body mass index and percentage of excess weight loss was available for 133 patients (83%) at office visits (n = 91, 68.4%), by telephone (n = 40, 30.1%), or by e-mail (n = 2, 1.5%).ResultsOf the 160 patients, 121 were women and 39 were men, with a mean age of 33.15 ± 10.0 years, percentage of ideal body weight of 195.7% ± 40.8%, and body mass index of 44.6 ± 9.3 kg/m2. The mean hospital stay was 3 ± 1 days. One patient (.6%) died of a pulmonary embolus. Early complications included 3 cases (1.87%) of upper gastrointestinal bleeding and 4 gastric leaks (2.5%): 2 (1.36%) from primary cases and 2 (14.29%) from revisional cases. Late complications included 32 patients (20%) with incisional hernias, 20 (12.5%) with anemia, 14 (8.8%) with dumping, 4 (2.5%) with gastrojejunal stricture, 2 (1.25%) with intestinal obstruction, and 2 (1.25%) requiring silastic ring surgical removal. The 5-year follow-up data were available for 133 patients (83%). The mean body mass index in this group was 27 ± 5 kg/m2, with a percentage of excess weight loss of 83% ± 18.3% at 5 years postoperatively.ConclusionThe results of our study have shown that SRVGB is an effective operation for promoting lasting weight loss, with acceptable mortality and complication rates. 相似文献
82.
83.
Renee R. Taylor PhD 《Health & social care in the community》2004,12(3):171-185
Chronic fatigue syndrome (CFS) is a controversial condition defined by 6 months or more of unexplained fatigue, and at least four out of eight cognitive and physical symptoms. Over the past 2 decades, CFS has been the subject of significant debate regarding its definition, cause and recommended treatment. Because a cure for the syndrome has not yet been located, efforts to improve functioning and overall quality of life through rehabilitation represent the most practised form of treatment to date. However, controversy remains as to which approach to rehabilitation is most effective for individuals with CFS. Interventions which take place within real‐world environments and utilise community‐based organizations such as centres for independent living offer a newly explored means of support and rehabilitation. The present paper reviews a variety of approaches to rehabilitation for individuals with CFS, describing their applications with different types of patients, and providing critical commentary on the research methodologies used to evaluate them. Innovative community‐based rehabilitation programmes and their outcomes are described as an alternative with some promise that may compliment more traditional approaches. 相似文献
84.
Auke J. S. Renard Ren P. H. Veth Maciej Pruszczynksi Jaap Hoogenhout Jos Bkkerink Frans J. M. Van Der Staak Theo Wobbes Josef A. M. Lemmens Ren van Hoesel Jim R. Van Horn 《Journal of surgical oncology》1995,60(4):250-256
This paper describes 29 patients with Ewing's sarcoma of bone treated between 1975 and 1990 at the University of Nijmegen Hospital, Nijmegen, The Netherlands. Osteomyelitis was the primary diagnosis in 24%. Treatment consisted of chemotherapy in combination with surgery and/or radiotherapy. Nine patients received radiotherapy only; five of them died of disease. Five patients underwent an intralesional excision; four of them died of disease. Twelve patients underwent a wide excision; there is no evidence of disease in any of them. Three patients underwent a radical disarticulation; all died of disease. The disease-free survival at 1.5 years was 66%. This figure at 5 years was 55%. After wide excision and reconstruction in tumors of expendable, femoral or radial bones good functional results were obtained in all cases. © 1995 Wiley-Liss, Inc. 相似文献
85.
The purpose of this investigation was to evaluate the effect on healing of fast and slow absorbable Tisseel in combination with periodontal flap surgery. Mucoperiosteal flaps were raised on the buccal aspect of maxillary premolars and mandibular premolars and first molars in 4 beagle dogs. The underlying buccal, interproximal and inter-radicular bone was then removed to a level of approximately 5 mm apically to the original bone crest and half way into the interdental spaces and bifurcations. The exposed root surfaces were curetted in order to remove the periodontal ligament tissue, and a notch was made in the root surface at the base of the defects. On the control teeth, the flaps were sutured immediately after creation of the defects, while on the test teeth, a layer of fast (group I) or slow (group II) absorbable Tisseel was applied between the curetted roots and the subsurface of the flaps prior to suturing. Postoperatively, the teeth were brushed 2 x weekly. The dogs were sacrificed after 4 months. Histological analysis revealed that the amounts of new attachment and bone regrowth were similar in the test and control groups, although the results tended to be most favorable for the group of teeth treated with fast absorbable Tisseel (Group I). 相似文献
86.
87.
Background : In order to find the most useful computerized auditing system for the needs of the QE II Hospital surgical department three surgical auditing software programs were assessed. Methods : The Otago University Surgical Auditing Program, the Australian Surgical Auditing Program, and RACS-Audit were trialled for a period of 1 month each. The software programs were evaluated to find the time requirements for data entry, the level of surgical knowledge needed for effective audit information entry, and the perceived usefulness of the generated reports. Results : It was found that the Otago University program best suited the needs of the department. This system was designed for use in a hospital environment with multiple users. The method of data collection was simple and rapid. Entry of data into the program was logical, well structured and able to be performed by both junior medical staff and clerical staff. Reports generated by this system included information in an appropriate format for the departments' morbidity and mortality meetings. Conclusion : Personal computers are an ideal tool for the undertaking of surgical audit. Software programs are designed for different uses and should be critically assessed to ensure that the method of data entry, the time involved, and the reports generated enable an efficient and effective audit to be carried out. 相似文献
88.
A patient with Type I hypoplastic patterned amelogenesis imperfecta, subtype D, presented for prosthodontic evaluation. This article describes the developmental and pathophysiological background of this disease. A clinical report describing the diagnosis, treatment planning, and dental rehabilitation of the patient is reviewed. 相似文献
89.
Procedural memory stimulation in Alzheimer's disease: impact of a training programme 总被引:5,自引:0,他引:5
O. Zanetti G. Binetti E. Magni L. Rozzini A. Bianchetti M. Trabucchi 《Acta neurologica Scandinavica》1997,95(3):152-157
The study evaluates the efficacy of a procedural memory stimulation programme in mild and mild-moderate Alzheimer's disease (AD). Twenty basic and instrumental activities of daily living have been selected, and divided into two groups, comparable for difficulty. Ten normal elderly subjects (age 68.0±4.8 years; MMSE score: 28.7±0.9; education: 7.6±3.5 years) were asked to perform the two groups of daily activities and the time required to perform the tasks of each group was recorded and used as a reference. Ten mild and mild-moderate AD patients (age 77.2±5.3 years; MMSE score: 19.8±3.5; education: 7.3±4.7 years) without major behavioural disturbances constituted the experimental group. Patients were evaluated in all 20 daily activities and the time employed was recorded at baseline and after a 3-week training (1 h/d, 5 d/week) period. Five patients were trained during the 3 weeks on half of the 20 daily activities and the other five patients were trained on the remainder. This procedure was adopted in order to detect separately the improvement in "trained" and "not trained" activities, allowing to control better the effects of the intervention. The assessment of the functional impact of the training was directly measured, through the variation of time employed to perform tasks before and after training. After 3 weeks of training a significant improvement was observed for the trained activities, from 3.6 to 1.9 standard deviations below the performance of the normal elderly controls ( P <0.05). AD patients improved also in not-trained activities from 3.5 to 2.7 standard deviations below the controls'performance ( P <0.05). The rehabilitation of activities of daily living through developing procedural memory strategies may be effective in mild and mild-moderate AD patients. 相似文献
90.
Clinical significance of 201Tl reverse redistribution in patients with aorto-coronary bypass surgery
Tsunehiko Nishimura Tashiisa Uehara Kohei Hayashida Takahira Kozuka 《European journal of nuclear medicine and molecular imaging》1987,13(3):139-142
Detection of myocardial ischemia by the stress thallium scan has traditionally been performed using transient defect analysis on exercise, followed by redistribution studies. Worsening of the 201Tl myocardial image from exercise to redistribution is referred to as reverse redistribution. In this study, we found reverse redistribution in 10 (21%) of 48 angina pectoris patients who had undergone aortocoronary bypass surgery. The clinical significance of this phenomenon in these patients was investigated in relation to angiographic and surgical findings. Reverse redistribution was found to occur in regions which were supplied by bypass grafts. These areas showed increased coronary blood flow and rapid thallium washout. Our results indicate that a perfusion defect in the bypass region of the redistribution image might be caused by relatively rapid washout in the bypass graft region compared to the adjacent normal myocardium. These results should be considered in the clinical interpretation of stress thallium scans. 相似文献