全文获取类型
收费全文 | 4501篇 |
免费 | 306篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 76篇 |
儿科学 | 155篇 |
妇产科学 | 63篇 |
基础医学 | 505篇 |
口腔科学 | 316篇 |
临床医学 | 259篇 |
内科学 | 1320篇 |
皮肤病学 | 100篇 |
神经病学 | 287篇 |
特种医学 | 101篇 |
外科学 | 662篇 |
综合类 | 15篇 |
一般理论 | 1篇 |
预防医学 | 288篇 |
眼科学 | 59篇 |
药学 | 284篇 |
中国医学 | 10篇 |
肿瘤学 | 314篇 |
出版年
2023年 | 22篇 |
2022年 | 36篇 |
2021年 | 156篇 |
2020年 | 72篇 |
2019年 | 127篇 |
2018年 | 156篇 |
2017年 | 110篇 |
2016年 | 98篇 |
2015年 | 120篇 |
2014年 | 150篇 |
2013年 | 184篇 |
2012年 | 256篇 |
2011年 | 292篇 |
2010年 | 167篇 |
2009年 | 182篇 |
2008年 | 219篇 |
2007年 | 262篇 |
2006年 | 214篇 |
2005年 | 242篇 |
2004年 | 237篇 |
2003年 | 210篇 |
2002年 | 198篇 |
2001年 | 152篇 |
2000年 | 193篇 |
1999年 | 129篇 |
1998年 | 49篇 |
1997年 | 40篇 |
1996年 | 34篇 |
1995年 | 18篇 |
1994年 | 21篇 |
1993年 | 14篇 |
1992年 | 71篇 |
1991年 | 63篇 |
1990年 | 62篇 |
1989年 | 48篇 |
1988年 | 37篇 |
1987年 | 26篇 |
1986年 | 24篇 |
1985年 | 20篇 |
1984年 | 7篇 |
1983年 | 10篇 |
1979年 | 10篇 |
1978年 | 7篇 |
1975年 | 8篇 |
1974年 | 5篇 |
1972年 | 4篇 |
1971年 | 4篇 |
1970年 | 7篇 |
1968年 | 7篇 |
1966年 | 4篇 |
排序方式: 共有4815条查询结果,搜索用时 875 毫秒
1.
Juan D. Gonzalez‐Sanz 《Nursing philosophy》2020,21(4)
The current situation in which the humanities are disparaged affects all university disciplines, including nursing, in whose historical evolution the humanities have always been present in one form or another. Looking beyond this disrepute, this study proposes that nursing renew its attention to classical philosophy. Specifically, it invites a close reading of Xenophon's Anabasis and Plato's Meno, to get three related goals: to show how the use of ancient texts are very valuable tools for the philosophical initiation of nursing students and can help them reflect on their choice of nursing as a practical activity; to reflect on the problem of virtue and the nature of the good life; and to show how the interaction with ancient texts allows students to reflect on questions and issues of life, theirs and others, that are not open to investigation through a purely scientific method. Consequently, both Anabasis and Meno readings strengthen the intellectual relationship between philosophy and nursing, enabling the latter to delve deeper into the key questions of its own thought as a discipline. 相似文献
2.
R. Di Raimondo J. Sanz-Esporrn R. Pl I. Sanz-Martn F. Luengo F. Vignoletti J. Nuez Mariano Sanz 《Clinical oral investigations》2020,24(7):2351-2361
To evaluate the changes in alveolar contour after guided bone regeneration (GBR) with two different combinations of biomaterials in dehiscence defects arou 相似文献
3.
4.
Miguel A. Sanz Pau Montesinos Haesook T. Kim Guillermo J. Ruiz-Argüelles María S. Undurraga María R. Uriarte Lem Martínez Rafael H. Jacomo Homero Gutiérrez-Aguirre Raul A. M. Melo Rosane Bittencourt Ricardo Pasquini Katia Pagnano Evandro M. Fagundes Edo Vellenga Alexandra Holowiecka Ana J. González-Huerta Pascual Fernández Javier De la Serna Salut Brunet Elena De Lisa José González-Campos José M. Ribera Isabel Krsnik Arnold Ganser Nancy Berliner Raul C. Ribeiro Francesco Lo-Coco Bob L?wenberg Eduardo M. Rego 《Annals of hematology》2015,94(8):1347-1356
5.
D. Sforza G. Iaria L. Petagna A. Parente A. Anselmo F. Sergi S. Marzio F. Corrado S. Telli T.M. Manzia G. Tisone 《Transplantation proceedings》2019,51(1):140-142
Background
One daily dose of tacrolimus (QDT) improves adherence in kidney transplant (KT) recipients. A switch from twice-daily tacrolimus (BDT) to QDT showed similar efficacy and safety.Methods
The aim of our study was to demonstrate the long-term efficacy and safety of switching from BDT to QDT in KT recipients. Preliminary results have already been published. Forty-one patients (34 men and 7 women), mean age at KT of 43.9 ± 12.7 years, underwent a 1:1 dose switch from BDT to QDT; the mean time from KT to switch was 36.6 ± 16.1 months. In our study population, 4 patients received a living donor KT and 2 received a second allograft.Results
The mean follow-up was 86.8 ± 13 months from the switch and 126.2 ± 22.3 months from KT. Graft and patient survival rates were 90.2% and 95.1%, respectively. All patients maintained stable renal function during follow-up. During the first 3 months after the switch we observed a significant decrease in tacrolimus blood level (P = .0001). No significant differences were observed regarding tacrolimus dose before and after QDT introduction (P = not significant [NS]). Fourteen patients who stopped steroids under BDT treatment and 16 patients who stopped steroids after the switch are currently steroid-free.Conclusion
Our study showed safety and efficacy in switching from BDT to QDT. After early (<1 year) dose adjustment, tacrolimus blood levels remained stable throughout follow-up. Moreover, QDT represented a valid alternative for patients showing steroid side effects. 相似文献6.
7.
8.
9.
Estrella Fernández Fabrellas Luis Almenar Bonet Silvia Ponce Pérez José Antonio Moro López Rafael Blanquer Olivas Antonio Salvador Sanz 《Archivos de bronconeumologia》2009,45(4):173-180
Introduction and objectiveWhen sleep apnea-hypopnea syndrome (SAHS) and cardiovascular disease occur concurrently, prognosis is affected. Echocardiography can detect structural cardiac abnormalities but using this technique in all patients would place a heavy burden on resources. The objective of this study was to investigate whether the N-terminal fraction of brain natriuretic peptide (NT-proBNP) can be used as a marker for silent heart disease.Patients and methodsNT-proBNP concentration was measured in the 114 consecutive patients with SAHS who underwent echocardiography before starting treatment. Left and right ventricular systolic and diastolic function, as well as structural abnormalities, were studied. Correlations between NT-proBNP concentration and the abnormalities detected were investigated. A receiver operating characteristics (ROC) curve was plotted for NT-proBNP concentration and cardiac abnormalities.ResultsData for 98 patients were finally analyzed. NT-proBNP concentration was significantly correlated with ventricular septal thickness (r=0.63), posterior wall thickness (r=0.45), and left ventricular enddiastolic diameter (r=0.51) (P<.0001 for all correlations). The area under the ROC curve was significant (0.870; 95% confidence interval, 0.801-0.939; P<.0001). Assuming that specificity would be more useful for clinical practice, we calculated that NT-proBNP concentrations below 100 and 200 pg/mL could rule out structural abnormalities with a reliability of 90% and 100%, respectively.ConclusionsNT-proBNP concentration was strongly correlated with echocardiographic abnormalities and so could be a useful tool for identifying patients who should be referred to the cardiologist. 相似文献
10.
Sergi Sastre Francisco Maculé Sandra Lasurt Josep-María Segur Lluis Lozano Montse Nuñez Santiago Suso 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2007,17(4):393-397
Five patients with idiopathic transient osteoporosis were examined. Bone scanning and MRI was helpful in the diagnosis to differentiate of necrosis and all patients recovered completely with conservative and symptomatic treatment. There was no history of trauma in all patients. MRI was realized previously in all cases to confirm the diagnosis and after the resolution of symptomathology. 相似文献