全文获取类型
收费全文 | 15826篇 |
免费 | 1152篇 |
国内免费 | 121篇 |
专业分类
耳鼻咽喉 | 204篇 |
儿科学 | 315篇 |
妇产科学 | 209篇 |
基础医学 | 2326篇 |
口腔科学 | 179篇 |
临床医学 | 1663篇 |
内科学 | 3856篇 |
皮肤病学 | 439篇 |
神经病学 | 1432篇 |
特种医学 | 943篇 |
外国民族医学 | 10篇 |
外科学 | 2341篇 |
综合类 | 63篇 |
一般理论 | 5篇 |
预防医学 | 717篇 |
眼科学 | 203篇 |
药学 | 997篇 |
中国医学 | 16篇 |
肿瘤学 | 1181篇 |
出版年
2024年 | 18篇 |
2023年 | 165篇 |
2022年 | 282篇 |
2021年 | 651篇 |
2020年 | 354篇 |
2019年 | 543篇 |
2018年 | 661篇 |
2017年 | 417篇 |
2016年 | 480篇 |
2015年 | 556篇 |
2014年 | 737篇 |
2013年 | 900篇 |
2012年 | 1318篇 |
2011年 | 1291篇 |
2010年 | 727篇 |
2009年 | 683篇 |
2008年 | 979篇 |
2007年 | 984篇 |
2006年 | 816篇 |
2005年 | 762篇 |
2004年 | 646篇 |
2003年 | 551篇 |
2002年 | 485篇 |
2001年 | 117篇 |
2000年 | 117篇 |
1999年 | 109篇 |
1998年 | 158篇 |
1997年 | 139篇 |
1996年 | 159篇 |
1995年 | 117篇 |
1994年 | 103篇 |
1993年 | 91篇 |
1992年 | 72篇 |
1991年 | 78篇 |
1990年 | 75篇 |
1989年 | 85篇 |
1988年 | 71篇 |
1987年 | 70篇 |
1986年 | 76篇 |
1985年 | 60篇 |
1984年 | 34篇 |
1983年 | 45篇 |
1982年 | 47篇 |
1981年 | 23篇 |
1980年 | 26篇 |
1979年 | 26篇 |
1978年 | 28篇 |
1977年 | 22篇 |
1976年 | 21篇 |
1975年 | 19篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
LN Weinberger MJ Zirwas JC English III 《Journal of the European Academy of Dermatology and Venereology》2007,21(2):156-162
Male genital oedema can be defined as swelling or the appearance of swelling of the scrotum and/or the penile shaft and prepuce. Despite the various causes of genital oedema reported in the published work, a concise approach to the evaluation and management has not been sufficiently addressed. 相似文献
62.
63.
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
64.
65.
66.
67.
68.
69.
70.
Uroscopy in the 21st century: high-field NMR spectroscopy 总被引:1,自引:1,他引:0
Neild GH; Foxall PJ; Lindon JC; Holmes EC; Nicholson JK 《Nephrology, dialysis, transplantation》1997,12(3):404-417
From the experiments described, it can be seen that there are different
research approaches that can be taken and these are summarized in Table 1.
Whereas much scientific research is principally hypothesis led, there
remains, nevertheless, an important place for exploratory research. High
resolution NMR can measure, directly and simultaneously, a wide range of
endogenous metabolites in biological fluids and has the unique capability
of providing structural information on the metabolites detected. It has
proved to be a powerful research tool with which to study inherited
metabolic diseases, renal disease, drug metabolism, and toxicity, and can
be used to monitor the effects of drug therapy. For instance, by using a
library of experimental toxins one can map the metabolic profile of
site-specific nephron injury. With this approach in man one could
eventually take an unknown disease such as Balkan nephropathy and predict
the initial site of tubular injury, the mode of injury and therefore the
kind of toxin capable of producing that injury. NMR spectroscopic
techniques are still advancing rapidly, with ever increasing sensitivity
and sophistication of NMR pulse sequences to enhance structural elucidation
in complex mixtures. Given the advances in directly coupled HPLC-NMR and
even HPLC-NMR-mass spectroscopy it is likely that these technologies in
conjunction with pattern recognition will make major contribution to our
understanding of renal processes and provide new diagnostic insights in the
21st century.
相似文献