全文获取类型
收费全文 | 2909篇 |
免费 | 172篇 |
国内免费 | 23篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 207篇 |
妇产科学 | 29篇 |
基础医学 | 337篇 |
口腔科学 | 83篇 |
临床医学 | 209篇 |
内科学 | 552篇 |
皮肤病学 | 42篇 |
神经病学 | 113篇 |
特种医学 | 228篇 |
外科学 | 351篇 |
综合类 | 90篇 |
一般理论 | 1篇 |
预防医学 | 137篇 |
眼科学 | 150篇 |
药学 | 363篇 |
1篇 | |
中国医学 | 38篇 |
肿瘤学 | 146篇 |
出版年
2023年 | 18篇 |
2022年 | 50篇 |
2021年 | 105篇 |
2020年 | 48篇 |
2019年 | 57篇 |
2018年 | 81篇 |
2017年 | 57篇 |
2016年 | 78篇 |
2015年 | 92篇 |
2014年 | 127篇 |
2013年 | 150篇 |
2012年 | 203篇 |
2011年 | 182篇 |
2010年 | 125篇 |
2009年 | 102篇 |
2008年 | 141篇 |
2007年 | 158篇 |
2006年 | 130篇 |
2005年 | 125篇 |
2004年 | 123篇 |
2003年 | 105篇 |
2002年 | 77篇 |
2001年 | 63篇 |
2000年 | 40篇 |
1999年 | 31篇 |
1998年 | 34篇 |
1997年 | 32篇 |
1996年 | 28篇 |
1995年 | 32篇 |
1994年 | 31篇 |
1993年 | 42篇 |
1992年 | 24篇 |
1991年 | 19篇 |
1990年 | 30篇 |
1989年 | 38篇 |
1988年 | 38篇 |
1987年 | 51篇 |
1986年 | 37篇 |
1985年 | 41篇 |
1984年 | 18篇 |
1983年 | 24篇 |
1982年 | 11篇 |
1981年 | 22篇 |
1980年 | 18篇 |
1979年 | 15篇 |
1978年 | 16篇 |
1977年 | 5篇 |
1975年 | 6篇 |
1974年 | 3篇 |
1965年 | 4篇 |
排序方式: 共有3104条查询结果,搜索用时 15 毫秒
1.
2.
V. Lenin Babu K. Baskaran 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2005,15(2):148-150
We report the case of a 20-year-old man with an ipsilateral mid-third clavicle fracture with grade V acromioclavicular joint (ACJ) dislocation. The combination of these two injuries is rare. A literature search produced various treatment algorithms. In this case, the patient was successfully treated with a Bosworth screw.This work was carried out in the Department of Orthopaedics, William Harvey Hospital, Ashford, Kent, UK 相似文献
3.
The immediate surgical goals in the treatment of thoraco-lumbar fractures are decompression of compromised neural structures and stabilization of the vertebral column. If more sophisticated instrumentation is available, e.g. A.O.-fixateur interne or instrument set according to Kluger, stable reposition and reformation of compressed vertebral bodies also becomes possible. The long-term goals are to prevent delayed onset of spinal deformity, pain, and further neurological deficit. Early operative stabilization also shortens hospitalization time and allows immediate ambulation, thus lessening pulmonary, vascular, urological, and psychological complications. The Department of Neurosurgery, Sher-I-Kashmir Institute of Medical Sciences, treated 75 cases of thoraco-lumbar fractures. Out of 75 cases 63 were operated upon: 32 cases by spinal fusion alone and 31 by a combined procedure of decompression and posterior spinal fusion with fibular graft. 52 showed evidence of recovery ranging from moderate to excellent in a follow-up of 2-3 years. Thus surgery resulted not only in giving a stable spine to patients but also good improvement of neurodeficits. Our experiences demonstrate that operative treatment of thoraco-lumbar fractures can give satisfactory results even in situations where sophisticated instrumentation is not available. 相似文献
4.
5.
6.
Raiju Jacob Babu Linda Lillakas Elizabeth L Irving 《Optometry and vision science》2005,82(12):1060-1065
PURPOSE: The aim of the study was to delineate differences in saccadic adaptation characteristics between a population of racquet sports athletes and nonathletes. METHODS: Eye movements were recorded at 120 Hz using a video-based eye tracker (ELMAR 2020) in a sample of 27 athletes (varsity badminton and squash players) and 14 nonathletes (<3 hours/week participation in recreational sports). Responses to negative positional error and positive positional error were studied in two sessions on separate days. Negative positional errors were induced by displacing the stimuli backwards by 3 degrees from the initial target step (12 degrees). Likewise, positive positional errors were induced by displacing the stimuli forward by 3 degrees . Amplitude gains were calculated for trials before, during, and after the adaptation phase. The magnitude and the rate of change of saccadic adaptation were determined from the amplitude gains. Differences between the groups were compared using regression analysis. RESULTS: No significant differences were found between the two groups in the magnitude of saccadic adaptation, both for negative (athletes -60%, nonathletes -57%) and positive (athletes +26%, and nonathletes +27%) positional error. Racquet sports athletes showed a significantly faster rate of adaptation for the positive positional error. A significant difference was not observed in the rate of adaptation for the negative positional error. CONCLUSIONS: Racquet sports athletes and nonathletes adapt to positional error signals by similar amounts. However, racquet sports athletes respond to positive positional errors at a faster rate, suggesting that a strategic component or environmental influences (such as practice) may play a role in saccadic adaptation. 相似文献
7.
Ten thrombocytopenic patients (platelets < 10–24 × 10(9)/L) who were refractory to platelet transfusion were investigated for their responsiveness to staphylococcal protein A column therapy. Nine patients had previously been treated with steroids, intravenous immune globulin, and/or other forms of immunosuppressive therapy without improvement in their transfusion response. All patients were receiving multiple platelet transfusions without achieving 1-hour corrected count increments (CCIs) > or = 7500. Eight patients had antibodies that reacted with platelets and were directed against HLA class I antigens, ABO antigens, and/or platelet-specific alloantigens. Plasma (500-2000 mL) from each patient was passed over a protein A silica gel column and then returned to the patient. Patients received from 1 to 14 treatments. A positive response to protein A therapy was defined as at least a doubling of the pretreatment platelet count and/or two successive 10- to 120-minute posttransfusion CCIs > or = 7500. Following plasma treatments, 6 of 10 patients responded with daily platelet counts that averaged 48 +/− 11 × 10(9) per L as compared with counts of 16 +/− 7 × 10(9) per L (p < 0.0005) before treatment. Posttransfusion CCI values determined in four of these patients averaged 2480 +/− 810 and 10,010 +/− 3540 (p < 0.005) before and after treatment, respectively. In contrast, among the four unresponsive patients, platelet counts averaged 10 +/− 9 and 13 +/− 10 × 10(9) per L (p = NS), respectively, while posttransfusion CCIs were 700 +/− 1410 and 1520 +/− 2460 (p = NS), respectively.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
8.
9.
Perforated colorectal neoplasms: correlation of clinical, contrast enema, and CT examinations 总被引:2,自引:0,他引:2
Hulnick DH; Megibow AJ; Balthazar EJ; Gordon RB; Surapenini R; Bosniak MA 《Radiology》1987,164(3):611-615
Results of clinical, contrast enema (CE), and computed tomographic (CT) examinations in 39 patients with perforated colorectal neoplasms were retrospectively reviewed. Twenty patients were toxemic at initial presentation, but in only four patients was the diagnosis of perforated colorectal neoplasm initially suspected clinically. CE study was performed in 22 patients and enabled the diagnosis of perforated neoplasm in 11 cases, neoplasm alone in eight, and neither neoplasm nor perforation in three. CT was performed in 38 patients and enabled the diagnosis of perforated neoplasm in 36; pericolic phlegmon but no mass lesion was evident in two. In 16 patients, CT also demonstrated metastatic disease. Because of its reliability in establishing the diagnosis and staging the extent of the inflammatory and neoplastic disease, CT is indicated in cases of suspected or proved perforated colorectal neoplasm and in cases in which CE study findings are indeterminate or suggestive of perforated neoplasm. 相似文献
10.