全文获取类型
收费全文 | 6756篇 |
免费 | 351篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 31篇 |
儿科学 | 80篇 |
妇产科学 | 88篇 |
基础医学 | 1033篇 |
口腔科学 | 57篇 |
临床医学 | 621篇 |
内科学 | 1223篇 |
皮肤病学 | 145篇 |
神经病学 | 753篇 |
特种医学 | 389篇 |
外科学 | 1129篇 |
综合类 | 18篇 |
一般理论 | 1篇 |
预防医学 | 233篇 |
眼科学 | 100篇 |
药学 | 490篇 |
中国医学 | 8篇 |
肿瘤学 | 739篇 |
出版年
2023年 | 29篇 |
2022年 | 59篇 |
2021年 | 90篇 |
2020年 | 76篇 |
2019年 | 101篇 |
2018年 | 123篇 |
2017年 | 119篇 |
2016年 | 154篇 |
2015年 | 155篇 |
2014年 | 207篇 |
2013年 | 274篇 |
2012年 | 367篇 |
2011年 | 455篇 |
2010年 | 268篇 |
2009年 | 279篇 |
2008年 | 436篇 |
2007年 | 479篇 |
2006年 | 448篇 |
2005年 | 482篇 |
2004年 | 462篇 |
2003年 | 457篇 |
2002年 | 406篇 |
2001年 | 110篇 |
2000年 | 60篇 |
1999年 | 88篇 |
1998年 | 97篇 |
1997年 | 81篇 |
1996年 | 58篇 |
1995年 | 58篇 |
1994年 | 52篇 |
1993年 | 46篇 |
1992年 | 33篇 |
1991年 | 32篇 |
1990年 | 26篇 |
1989年 | 39篇 |
1988年 | 39篇 |
1987年 | 19篇 |
1986年 | 17篇 |
1985年 | 29篇 |
1984年 | 20篇 |
1983年 | 18篇 |
1982年 | 22篇 |
1981年 | 24篇 |
1980年 | 22篇 |
1979年 | 28篇 |
1978年 | 25篇 |
1977年 | 25篇 |
1976年 | 28篇 |
1975年 | 16篇 |
1973年 | 17篇 |
排序方式: 共有7138条查询结果,搜索用时 15 毫秒
1.
Mt D. Dbrssy Chockalingam Ramanathan Danesh Ashouri Vajari Yixin Tong Thomas Schlaepfer Volker A. Coenen 《The European journal of neuroscience》2021,53(1):89-113
Deep brain stimulation (DBS) in psychiatric illnesses has been clinically tested over the past 20 years. The clinical application of DBS to the superolateral branch of the medial forebrain bundle in treatment‐resistant depressed patients—one of several targets under investigation—has shown to be promising in a number of uncontrolled open label trials. However, there are remain numerous questions that need to be investigated to understand and optimize the clinical use of DBS in depression, including, for example, the relationship between the symptoms, the biological substrates/projections and the stimulation itself. In the context of precision and customized medicine, the current paper focuses on clinical and experimental research of medial forebrain bundle DBS in depression or in animal models of depression, demonstrating how clinical and scientific progress can work in tandem to test the therapeutic value and investigate the mechanisms of this experimental treatment. As one of the hypotheses is that depression engenders changes in the reward and motivational networks, the review looks at how stimulation of the medial forebrain bundle impacts the dopaminergic system. 相似文献
2.
3.
Oliver Sartor MD Daniel Heinrich MD Neil Mariados MD Maria José Méndez Vidal MD Daniel Keizman MD Camilla Thellenberg Karlsson MD Avivit Peer MD Giuseppe Procopio MD Stephen J. Frank MD Kalevi Pulkkanen MD Eli Rosenbaum MD Stefano Severi MD José Trigo MD Lucia Trandafir MD Volker Wagner MD Rui Li MS Luke T. Nordquist MD 《The Prostate》2019,79(14):1683-1691
4.
5.
Lucia Nogovà MD Volker Diehl MD Andreas Engert MD 《Current hematologic malignancy reports》2006,1(1):60-65
Lymphocyte-predominant Hodgkin’s lymphoma (LPHL) differs in histologic and clinical presentation from classical Hodgkin’s
lymphoma (cHL). Treatment of LPHL patients using standard Hodgkin’s lymphoma protocols leads to complete remission in more
than 95% of patients. Survival and freedom from treatment failure are substantially worse in advanced-stage patients than
for early-stage patients. Thus, patients in advanced stages and those in early stages with unfavorable risk factors should
be treated similar to those with cHL. In contrast, patients with early-stage LPHL without risk factors might be sufficiently
treated with reduced-intensity programs having less severe adverse effects. As a result, treatment of early LPHL is rather
heterogeneous, including radiotherapy using extended-fleld technique, involved-fleld radiotherapy (IF-RT), combined-modality
treatment, and, more recently, monoclonal antibodies. Watch-and-wait strategy plays an important role in pediatric oncology,
to avoid adverse effects associated with therapy. IF-RT seems to be emerging as a treatment of choice for patients with stage
IA LPHL; most larger study groups, such as the German Hodgkin Study Group and the European Organisation for Research and Treatment
of Cancer, have adopted IF-RT as the treatment of choice for these patients. 相似文献
6.
We evaluated the acquisition and performance of a high-precision locomotor task in patients with Parkinson's disease (PD) and healthy subjects. All subjects walked on a treadmill and had to step repetitively as low as possible over an obstacle without touching it. During blocks 1 and 2, the subjects had full vision and received additional acoustic warning and feedback signals. During block 3, vision became restricted. Changes in foot clearance and the number of obstacle hits were evaluated. Initially, PD patients performed poorer and improved foot clearance slower. After task repetition, the groups performed similarly. Restricting vision deteriorated performance in both groups. The similar performance of PD patients after task repetition might indicate that adequate training could improve adaptive locomotor behavior in PD patients. 相似文献
8.
Uta Kraus-Tiefenbacher Lelia Bauer Antonella Scheda Carola Schoeber Joerg Schaefer Volker Steil Frederik Wenz 《BMC cancer》2007,7(1):178
Background
For patients suffering of recurrent breast cancer within the irradiated breast, generally mastectomy is recommended. The normal tissue tolerance does not permit a second full-dose course of radiotherapy to the entire breast after a second breast-conserving surgery (BCS). A novel option is to treat these patients with partial breast irradiation (PBI). This approach is based on the hypothesis that re-irradiation of a limited volume will be effective and result in an acceptable frequency of side effects. The following report presents a single center experience with intraoperative radiotherapy (IORT) during excision of recurrent breast cancer in the previously irradiated breast. 相似文献9.
Holger F. Boehm Felix Eckstein Caecilia Wunderer Volker Kuhn Eva-Maria Lochmueller Karin Schreiber Dirk Mueller Ernst J. Rummeny Thomas M. Link 《Journal of clinical densitometry》2005,8(4):488-494
We tested the hypothesis that bone mineral density (BMD) and bone mineral content (BMC) in proximal human femur specimens in the upper neck region of interest (ROI) and femoral neck axis length (FNAL) provide a significantly better prediction of femoral bone strength than standard ROIs in vitro. BMD and BMC were measured in 110 proximal femur specimens using a standard dual-energy X-ray absorptiometry (DXA) scanner. The analysis included a new ROI in the upper neck as well as the standard ROIs. FNAL was obtained from the scan images. The specimens' failure-load was measured in a mechanical loading device, simulating a fall on the greater trochanter. For the standard ROIs, correlations between failure-load and BMD ranged from R2 = 0.64 (shaft ROI) to R2 = 0.70, p < 0.001 (femoral neck). Prediction of strength by BMD did not significantly differ from those of BMC (R2 ranging from 0.65 to 0.75, p < 0.001). In the upper neck ROI, for both BMD and BMC correlations with failure-load were higher (R2 = 0.76 and 0.81, respectively; p < 0.001). A lower, yet still significant, correlation was found between FNAL and bone strength (R2 = 0.23, p < 0.001). Normalization of failure-load with respect to FNAL did not significantly increase the correlations with densitometric measures. This study provides in vitro evidence indicating that among the ROIs of the proximal femur the newly defined upper neck ROI provides the best prediction of bone strength. Only a weak association was observed between failure load and FNAL. 相似文献
10.