全文获取类型
收费全文 | 15080篇 |
免费 | 1085篇 |
国内免费 | 65篇 |
专业分类
耳鼻咽喉 | 204篇 |
儿科学 | 255篇 |
妇产科学 | 202篇 |
基础医学 | 2291篇 |
口腔科学 | 159篇 |
临床医学 | 1549篇 |
内科学 | 3645篇 |
皮肤病学 | 391篇 |
神经病学 | 1421篇 |
特种医学 | 665篇 |
外国民族医学 | 10篇 |
外科学 | 2343篇 |
综合类 | 40篇 |
一般理论 | 5篇 |
预防医学 | 699篇 |
眼科学 | 204篇 |
药学 | 970篇 |
中国医学 | 14篇 |
肿瘤学 | 1163篇 |
出版年
2024年 | 18篇 |
2023年 | 162篇 |
2022年 | 279篇 |
2021年 | 648篇 |
2020年 | 347篇 |
2019年 | 541篇 |
2018年 | 646篇 |
2017年 | 417篇 |
2016年 | 478篇 |
2015年 | 548篇 |
2014年 | 732篇 |
2013年 | 871篇 |
2012年 | 1315篇 |
2011年 | 1291篇 |
2010年 | 707篇 |
2009年 | 637篇 |
2008年 | 974篇 |
2007年 | 948篇 |
2006年 | 810篇 |
2005年 | 755篇 |
2004年 | 643篇 |
2003年 | 553篇 |
2002年 | 486篇 |
2001年 | 122篇 |
2000年 | 110篇 |
1999年 | 96篇 |
1998年 | 94篇 |
1997年 | 61篇 |
1996年 | 62篇 |
1995年 | 57篇 |
1994年 | 46篇 |
1993年 | 40篇 |
1992年 | 64篇 |
1991年 | 74篇 |
1990年 | 62篇 |
1989年 | 60篇 |
1988年 | 45篇 |
1987年 | 46篇 |
1986年 | 45篇 |
1985年 | 29篇 |
1984年 | 32篇 |
1983年 | 36篇 |
1982年 | 35篇 |
1981年 | 17篇 |
1980年 | 21篇 |
1979年 | 18篇 |
1978年 | 16篇 |
1977年 | 13篇 |
1974年 | 16篇 |
1972年 | 16篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Stéphane Aubert Roland Henaine Olivier Raisky Nicolas Chavanis Jacques Robin René Ecochard Jean Ninet 《European journal of cardio-thoracic surgery》2005,28(2):223-228
OBJECTIVE: We consider the short- and long-term outcomes of the repair of the isolated partial atrioventricular (AV) septal defect to determine the role played by the atypical forms on the initial AV valve replacement and on the risk of reoperation. METHODS: Two hundred and eight patients underwent an operation for this malformation between 1974 and 2001. Clinical and echocardiographic examinations were performed on all patients, the AV valve regurgitation was graded from 1 to 4 and a residual interatrial shunt was sought. Median age at the intervention was 5.8 years (3 months to 67 years). RESULTS: Median follow-up time was 7.5 years (range 0-22.6 years). The cumulative 30-day, 5- and 20-year survival rates were 96.5, 95.4 and 94.6%, respectively. AV valve replacement was associated with a high mortality (P<0.001). A reoperation was performed on 12 patients (5.7%) including six patients within less than a 30-day period, especially to repair residual AV valve regurgitation. We performed four AV valve repairs by annuloplasty and six AV valve replacements. Two patients who had initially undergone an AV valve replacement underwent a reoperation for valve thrombosis. The cumulative 30-day, 5- and 20-year rates of freedom from reoperation were 96.5, 93.6 and 83%, respectively. An atypical form was present in 24 patients (11.5%) and was a risk factor for initial AV valve replacement (P<0.001) and for reoperation (P<0.001). A complete AV block occurred in 13 patients (6.2%), all of them within a 30-day period. The AV valve replacement was a high risk factor for a complete AV block (P<0.001). At the end of our study 180 patients (96%) were in NYHA I and 8 in NYHA II. CONCLUSIONS: The morbi-mortality of the isolated partial AV septal defect is primarily perioperative and is linked with the presence of an atypical form of the lesion. This atypical form was the main reason for reoperation for AV valve regurgitation. The AV valve replacement was associated with a high mortality and with the occurrence of complete AV block. Using a standardized technique, the AV septal defect can be repaired with excellent long-term clinical and echographic results. 相似文献
42.
43.
44.
45.
46.
47.
The topic of this article is to probe into the specificities of suicide by jumping. This means of suicide hasn't been studied much and isn't well known yet.We reviewed the international scientific literature so as to take an in-depth look at this type of auto-aggressive action and highlight the characteristics of the subjects likely to commit suicide by jumping. We thus focus on the available epidemiological data and risk factors associated to suicide jumping. We also describe the prevention strategies most often evoked to deal with this public health issue, which are respectively about improving safety on the identified suicide sites and providing medical and psychological care to individuals likely to commit suicide by jumping.This meta-analysis presents our critical analysis of the methodological limits in the studies exposed. We provide further hints for researching this field of study; they're based on both the taking into account of variables that could be risk factors for this particular means of suicide and the evaluation of the efficiency for the preventive measures used. 相似文献
48.
Patients with chronic pain constitute a major problem for the surgeon as the cause of their pain is often difficult to diagnose and is only rarely a well circumscribed lesion which is amenable to surgical or other treatment. We report a case of chronic pain due to a vascular leiomyoma beneath the deep fascia of the leg. Angioleiomyomas are rare tumours that are usually found in the subcutaneous tissue. 相似文献
49.
Yves de Roten Mlanie Fischer Martin Drapeau Vronique Beretta Ueli Kramer Nathalie Favre Jean‐Nicolas Despland 《Clinical psychology & psychotherapy》2004,11(5):324-331
Early therapeutic alliance is usually measured by the rating of a single session (between the third and the fifth sessions). However, there is a strong argument in favor of viewing early alliance as a developing process. This study examined the relationship between patient's rating of the helping alliance (HAq) at each session and therapy outcome. This comparison was repeated using patterns of alliance over the course of treatment. Patterns of therapeutic alliance development were detected by clustering ratings of a sample of N = 70 outpatients across four sessions of very brief psychotherapeutic intervention. Cluster analysis revealed two main patterns (shapes) of alliance development: (i) stable alliance, and (ii) linear growth pattern. These patterns are more predictive of symptom improvement and social adjustment than single ratings, whereas single ratings measuring the strength of alliance are more correlated with patient's satisfaction. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
50.
Serge Perrot Vincent Calvez Jean-Paul Escande Nicolas Dupin Anne-Geneviève Marcelin 《Journal of clinical virology》2003,28(2):165-168
BACKGROUND: Sj?gren's syndrome (SS) is an autoimmune exocrinopathy associated with multiple autoantibodies, lymphocyte infiltration of various organs, and functional deficiency of T cells. Several viruses have been implicated by PCR based studies, but their contribution to the pathophysiology of SS is still controversial. OBJECTIVES: In an attempt to explore the presence of human herpesviruses DNA sequences in salivary glands biopsies from patients suffering of SS, a recently developed strategy based on PCR with consensus degenerated primers that allowed to detect known and eventually unknown herpesviruses was used. STUDY DESIGN: Salivary glands biopsies from 55 patients suffering of primary and SS syndrome were explored by herpesviruses consensus PCR primers and all the PCR products were sequenced. RESULTS: Nine out of 55 salivary glands were positive by PCR and sequence analyses allowed to identify Epstein-Barr virus (EBV) in 6 cases and herpes simplex virus (HSV)-1 in 3 cases. We did not detect any sequences that could be related to a new herpesvirus. CONCLUSION: In view of the good sensitivity of the technique used, our study is not consistent with SS being associated with an unknown herpesvirus. However, our results suggest that EBV and HSV-1 could be implicated in a subset of SS cases and this possibility needs to be explored, to assess the potential benefit of antiviral drugs in some cases. 相似文献