全文获取类型
收费全文 | 46749篇 |
免费 | 4013篇 |
国内免费 | 95篇 |
专业分类
耳鼻咽喉 | 382篇 |
儿科学 | 1529篇 |
妇产科学 | 1160篇 |
基础医学 | 7036篇 |
口腔科学 | 1006篇 |
临床医学 | 6125篇 |
内科学 | 8201篇 |
皮肤病学 | 765篇 |
神经病学 | 4262篇 |
特种医学 | 1326篇 |
外国民族医学 | 3篇 |
外科学 | 4893篇 |
综合类 | 591篇 |
一般理论 | 51篇 |
预防医学 | 5531篇 |
眼科学 | 808篇 |
药学 | 3594篇 |
1篇 | |
中国医学 | 148篇 |
肿瘤学 | 3445篇 |
出版年
2023年 | 287篇 |
2022年 | 502篇 |
2021年 | 930篇 |
2020年 | 638篇 |
2019年 | 884篇 |
2018年 | 1128篇 |
2017年 | 765篇 |
2016年 | 856篇 |
2015年 | 1093篇 |
2014年 | 1325篇 |
2013年 | 2051篇 |
2012年 | 2902篇 |
2011年 | 3091篇 |
2010年 | 1638篇 |
2009年 | 1534篇 |
2008年 | 2574篇 |
2007年 | 2705篇 |
2006年 | 2714篇 |
2005年 | 2572篇 |
2004年 | 2430篇 |
2003年 | 2275篇 |
2002年 | 2096篇 |
2001年 | 972篇 |
2000年 | 944篇 |
1999年 | 896篇 |
1998年 | 513篇 |
1997年 | 421篇 |
1996年 | 438篇 |
1995年 | 372篇 |
1994年 | 353篇 |
1993年 | 308篇 |
1992年 | 651篇 |
1991年 | 581篇 |
1990年 | 566篇 |
1989年 | 516篇 |
1988年 | 467篇 |
1987年 | 476篇 |
1986年 | 464篇 |
1985年 | 429篇 |
1984年 | 371篇 |
1983年 | 315篇 |
1982年 | 264篇 |
1981年 | 227篇 |
1980年 | 217篇 |
1979年 | 313篇 |
1978年 | 234篇 |
1977年 | 198篇 |
1974年 | 217篇 |
1973年 | 201篇 |
1972年 | 206篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
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
42.
PROBLEM: Recent developments in providing care to children with emotional and behavioral disorders, especially those with serious emotional disturbance, have included the establishment of systems of care. Guided by a set of principles and values, these systems of care have organized and delivered services to children and families with complex needs. To date, nurses have not had a salient role in systems of care. RESULTS: It is estimated that 20% of American children and adolescents have an emotional or mental disorder. As many as two thirds of these children are not receiving services. Systems of care have been funded to provide services for these children, particularly for the most severely affected. To date, nursing has not had a prominent role in these systems of care. CONCLUSIONS: Based on their knowledge, skills, and holistic approach to care, nurses could better integrate nursing care into systems of care. Possible roles as case managers, primary therapists, in-home interventionists, and in educational programs are suggested. 相似文献
43.
Sandra Urdaneta Hartmann Brian Wigdahl Elizabeth B Neely Cheston M Berlin Cara-Lynne Schengrund Hung-Mo Lin Mary K Howett 《Journal of human lactation》2006,22(1):61-74
Reduction of transmission of human immunodeficiency virus type 1 (HIV-1) through human milk is needed. Alkyl sulfates such as sodium dodecyl sulfate (SDS) are microbicidal against HIV-1 at low concentrations, have little to no toxicity, and are inexpensive. The authors have reported that treatment of HIV-1-infected human milk with < or = 1% (10 mg/mL) SDS for 10 minutes inactivates cell-free and cell-associated virus. The SDS can be removed with a commercially available resin after treatment without recovery of viral infectivity. In this article, the authors report results of selective biochemical analyses (ie, protein, immunoglobulins, lipids, cells, and electrolytes) of human milk subjected to SDS treatment and removal. The SDS treatment or removal had no significant effects on the milk components studied. Therefore, the use of alkyl sulfate microbicides to treat milk from HIV-1-positive women may be a simple, practical, and nutritionally sound way to prevent or reduce transmission of HIV-1 while still feeding with mother's own milk. 相似文献
44.
45.
Sumon Nandi Steven Maschke Peter J. Evans Jeffrey N. Lawton 《Hand (New York, N.Y.)》2009,4(4):368-379
Elbow motion is essential for upper extremity function to position the hand in space. Unfortunately, the elbow joint is prone
to stiffness following a multitude of traumatic and atraumatic etiologies. Elbow stiffness can be diagnosed with a complete
history and physical exam, supplemented with appropriate imaging studies. The stiff elbow is challenging to treat, and thus,
its prevention is of paramount importance. When this approach fails, non-operative followed by operative treatment modalities
should be pursued. Upon initial presentation in those who have minimal contractures of 6-month duration or less, static and
dynamic splinting, serial casting, continuous passive motion, occupational/physical therapy, and manipulation are non-operative
treatment modalities that may be attempted. A stiff elbow that is refractory to non-operative management can be treated surgically,
either arthroscopically or open, to eliminate soft tissue or bony blocks to motion. In the future, efforts to prevent and
treat elbow stiffness may target the basic science mechanisms involved. Our purpose was to review the etiologies, classification,
evaluation, prevention, operative, and non-operative treatment of the stiff elbow. 相似文献
46.
47.
Blindsight is a visual phenomenon whereby hemianopic patients are able to process visual information in their blind visual field without awareness. Previous research demonstrating the existence of blindsight in hemianopic patients has been criticized for the nature of the paradigms used, for the presence of methodological artifacts, and for the possibility that spared islands of visual cortex may have sustained the phenomenon because the patients generally had small circumscribed lesions. To respond to these criticisms, the authors have been investigating for several years now residual visual abilities in the blind field of hemispherectomized patients in whom a whole cerebral hemisphere has been removed or disconnected from the rest of the brain. These patients have offered a unique opportunity to establish the existence of blindsight and to investigate its underlying neuronal mechanisms because in these cases, spared islands of visual cortex cannot be evoked to explain the presence of visual abilities in the blind field. In addition, the authors have been using precise behavioral paradigms, strict control for potential methodological artifacts such as light scatter, fixation, criterion effects, and macular sparing, and they have utilized new neuroimaging techniques such as diffusion tensor imaging tractography to enhance their understanding of the phenomenon. The following article is a review of their research on the involvement of the superior colliculi in blindsight in hemispherectomized patients. . 相似文献
48.
Sandra E. File 《Human psychopharmacology》1987,2(3):151-158
The clinical efficacy of the benzodiazepines in reducing anxiety is widely accepted. However, the search for novel anxiolytics continues, motivated by the hope of finding a non-sedative anxiolytic. This article reviews the pre-clinical evidence for new compounds as it relates both to their anxiolytic actions in animal tests and to their sedative potential. Drugs acting at sites on the GABA-benzodiazepine receptor complex are discussed, as well as the potential importance of aminergic and peptidergic pathways. 相似文献
49.
50.