全文获取类型
收费全文 | 2645035篇 |
免费 | 209963篇 |
国内免费 | 6100篇 |
专业分类
耳鼻咽喉 | 38194篇 |
儿科学 | 78674篇 |
妇产科学 | 70119篇 |
基础医学 | 371106篇 |
口腔科学 | 76814篇 |
临床医学 | 236981篇 |
内科学 | 522810篇 |
皮肤病学 | 53920篇 |
神经病学 | 219812篇 |
特种医学 | 105297篇 |
外国民族医学 | 940篇 |
外科学 | 404128篇 |
综合类 | 63362篇 |
现状与发展 | 2篇 |
一般理论 | 1028篇 |
预防医学 | 203124篇 |
眼科学 | 62574篇 |
药学 | 200518篇 |
5篇 | |
中国医学 | 5903篇 |
肿瘤学 | 145787篇 |
出版年
2018年 | 27092篇 |
2017年 | 20870篇 |
2016年 | 22803篇 |
2015年 | 25740篇 |
2014年 | 37098篇 |
2013年 | 55699篇 |
2012年 | 75262篇 |
2011年 | 79024篇 |
2010年 | 46540篇 |
2009年 | 44787篇 |
2008年 | 75048篇 |
2007年 | 80134篇 |
2006年 | 80844篇 |
2005年 | 78468篇 |
2004年 | 75451篇 |
2003年 | 72938篇 |
2002年 | 71972篇 |
2001年 | 130840篇 |
2000年 | 135721篇 |
1999年 | 114288篇 |
1998年 | 31488篇 |
1997年 | 28464篇 |
1996年 | 28008篇 |
1995年 | 26948篇 |
1994年 | 25246篇 |
1993年 | 23511篇 |
1992年 | 90928篇 |
1991年 | 87156篇 |
1990年 | 83967篇 |
1989年 | 81352篇 |
1988年 | 75202篇 |
1987年 | 73838篇 |
1986年 | 69692篇 |
1985年 | 66263篇 |
1984年 | 49485篇 |
1983年 | 41982篇 |
1982年 | 24878篇 |
1981年 | 21984篇 |
1979年 | 45576篇 |
1978年 | 31611篇 |
1977年 | 26774篇 |
1976年 | 24594篇 |
1975年 | 26064篇 |
1974年 | 32123篇 |
1973年 | 30358篇 |
1972年 | 28591篇 |
1971年 | 26474篇 |
1970年 | 24847篇 |
1969年 | 23222篇 |
1968年 | 21032篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
Amy Y. Zhang Christopher Burant Alex Z. Fu Gerald Strauss Donald R. Bodner Lee Ponsky 《Journal of psychosocial oncology》2020,38(2):210-227
AbstractPurpose: We examined underlying psychosocial processes of a behavioral treatment for urinary incontinence (UI) of prostate cancer survivors.Design: Secondary analysis of data collected from a clinical trial.Sample: Two hundred forty-four prostate cancer survivors who participated in a clinical trial of behavioral intervention to UI as intervention or control subjects.Methods: The participants had a 3-month behavioral intervention or usual care and were followed up for an additional 3?months. They were assessed at baseline, 3, and 6?months. Latent growth curve models were performed to examine trajectories of each study variable and relationships among the variables.Findings: Increasing self-efficacy and social support were significantly and independently associated with more reduction of urinary leakage frequency over time.Implications for psychosocial oncology: Providing problem-solving skills and social support, including peer support, are essential for empowering patients to reduce UI. 相似文献
22.
23.
Lalia Y. Ibrahim Krank P. DiFilippo Geremy E. Steed Manuel D. Cerqueira 《Journal of nuclear cardiology》2006,13(6):855-866
Conclusion Several quality-control measures take place before (patient and camera preparation) and during SPECT acquisition to achieve
high-quality images. Not uncommonly, technologists and physicians are left with suboptimal images that have to be addressed
to reach the “right answer” for patient diagnosis and hence management. In many cases patients may be reimaged, especially
if the problem is detected early, but in other cases either the patient has left the nuclear laboratory or there is an inevitable
problem that, even with reimaging, will not be resolved. In these situations the technologist and physician have to seek the
available techniques to obtain the best images possible. These resources are discussed in this issue as an aid in quality
control to obtain the best possible images. 相似文献
24.
D B Irving J L Cook H B Menz 《Journal of Science and Medicine in Sport》2006,9(1-2):11-22; discussion 23-4
25.
Peter G. Danias Thomas H. Hauser George Katsimaglis Rene M. Botnar Warren J. Manning 《Herz》2003,15(4):90-98
Coronary magnetic resonance angiography (CMRA) is a technique in clinical evolution. Current clinical applications include assessment for coronary anomalies, aneurysms, bypass graft patency, and, in experienced centers, the exclusion of proximal and multivessel coronary artery disease (CAD). As local expertise increases and more extensive multicenter data become available, additional applications will be established. CMRA promises to supplement and in some cases obviate the need for X-ray contrast angiography, and to expand our understanding of the pathophysiology of CAD. Zusammenfassung Die Magnetresonanzangiographie der Koronargefäße (CMRA) ist eine sich ständig weiterentwickelnde Technik. Etablierte Anwendungen sind zurzeit die Beurteilung von koronaren Anomalien, Aneurysmen und der Durchgängigkeit von Bypasses. Auch der Ausschluss proximaler Koronarstenosen und einer koronaren Mehrgefäßerkrankung ist in einigen spezialisierten Zentren möglich. Mit zunehmender Erfahrung der jeweiligen Anwender und der Verfügbarkeit von Ergebnissen großer multizentrischer Studien können zukünftig weitere klinische Anwendungen etabliert werden. In der Zukunft könnte die CMRA ergänzende Informationen zur Indikationsstellung einer konventionellen Röntgenangiographie bringen und in einigen Fällen diese Untersuchung sogar ersetzen. Die CMRA wird unseren Einblick in die Pathophysiologie der koronaren Herzerkrankung sicher erweitern. 相似文献
26.
A I D'hulst K R Bracke T Maes J L De Bleecker R A Pauwels G F Joos G G Brusselle 《The European respiratory journal》2006,28(1):102-112
Chronic obstructive pulmonary disease (COPD) is characterised by a local pulmonary inflammatory response to respiratory pollutants and by systemic inflammation. Tumour necrosis factor (TNF)-alpha has been implicated in systemic effects of COPD and operates by binding the p55 (R1) and p75 (R2) TNF-alpha receptors. To investigate the contribution of each TNF-alpha receptor in the pathogenesis of COPD, the present study examined the effects of chronic air or cigarette smoke (CS) exposure in TNF-alpha R1 knockout (KO) mice, TNF-alpha R2 KO mice and wild type (WT) mice. CS was found to significantly increase the protein levels of soluble TNF-alpha R1 (by four-fold) and TNF-alpha R2 (by 10-fold) in the bronchoalveolar lavage of WT mice. After 3 months, CS induced a prominent pulmonary inflammatory cell influx in WT and TNF-alpha R1 KO mice. In TNF-alpha R2 KO mice, CS-induced pulmonary inflammation was clearly attenuated. After 6 months, no emphysema was observed in CS-exposed TNF-alpha R2 KO mice in contrast to WT and TNF-alpha R1 KO mice. CS-exposed WT and TNF-alpha R1 KO mice failed to gain weight, whereas the body mass of TNF-alpha R2 KO mice was not affected. These current findings suggest that both tumour necrosis factor-alpha receptors contribute to the pathogenesis of chronic obstructive pulmonary disease, but tumour necrosis factor-alpha receptor-2 is the most active receptor in the development of inflammation, emphysema and systemic weight loss in this murine model of chronic obstructive pulmonary disease. 相似文献
27.
28.
29.
S. Spinty H. Rogozinski G. T. Lealman J. E. Wraith 《Journal of inherited metabolic disease》2003,25(8):697-698
Summary: A female patient with isovaleric acidaemia had a successful outcome from pregnancy. 相似文献
30.