全文获取类型
收费全文 | 275493篇 |
免费 | 37412篇 |
国内免费 | 3521篇 |
专业分类
耳鼻咽喉 | 6891篇 |
儿科学 | 7223篇 |
妇产科学 | 4247篇 |
基础医学 | 23527篇 |
口腔科学 | 4573篇 |
临床医学 | 37929篇 |
内科学 | 69272篇 |
皮肤病学 | 11264篇 |
神经病学 | 24788篇 |
特种医学 | 13530篇 |
外科学 | 56633篇 |
综合类 | 776篇 |
现状与发展 | 75篇 |
一般理论 | 28篇 |
预防医学 | 13618篇 |
眼科学 | 6571篇 |
药学 | 12492篇 |
中国医学 | 1492篇 |
肿瘤学 | 21497篇 |
出版年
2024年 | 742篇 |
2023年 | 5545篇 |
2022年 | 3895篇 |
2021年 | 7446篇 |
2020年 | 7952篇 |
2019年 | 5067篇 |
2018年 | 10879篇 |
2017年 | 10130篇 |
2016年 | 12091篇 |
2015年 | 13585篇 |
2014年 | 21528篇 |
2013年 | 22767篇 |
2012年 | 16677篇 |
2011年 | 16241篇 |
2010年 | 16281篇 |
2009年 | 19238篇 |
2008年 | 13225篇 |
2007年 | 11125篇 |
2006年 | 12851篇 |
2005年 | 9675篇 |
2004年 | 8198篇 |
2003年 | 6493篇 |
2002年 | 5931篇 |
2001年 | 6804篇 |
2000年 | 5773篇 |
1999年 | 5325篇 |
1998年 | 4515篇 |
1997年 | 4106篇 |
1996年 | 3846篇 |
1995年 | 3647篇 |
1994年 | 2316篇 |
1993年 | 1892篇 |
1992年 | 2114篇 |
1991年 | 2090篇 |
1990年 | 1688篇 |
1989年 | 1727篇 |
1988年 | 1469篇 |
1987年 | 1316篇 |
1986年 | 1213篇 |
1985年 | 1079篇 |
1984年 | 805篇 |
1983年 | 707篇 |
1982年 | 644篇 |
1981年 | 565篇 |
1980年 | 485篇 |
1979年 | 532篇 |
1978年 | 490篇 |
1977年 | 516篇 |
1975年 | 401篇 |
1972年 | 409篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
23.
Sung Woo Lee Sung Hyuk Choi Yunsik Hong Wanbae Kim 《European journal of emergency medicine》2006,13(2):117-118
Generally, a computed tomography scan is conducted for the diagnosis of stroke in the emergency department, because these scans are easier and faster in the detection of stroke. If there are no signs of hemorrhage on computed tomography scan, an ischemic stroke is diagnosed and treated accordingly. A magnetic resonance imaging scan may be taken in order to verify ischemic stroke. This process may lead to improper treatment and is time consuming. To address this situation, case studies are presented in which magnetic resonance imaging diffusion-weighted imaging and gradient recalled echo were performed to detect hemorrhagic and ischemic stroke and particularly, subarachnoid hemorrhage, which is undetectable with a computed tomography scan. 相似文献
24.
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
25.
26.
Rajnish Mago MD John-Paul Gomez MD Namita Gupta MBBS Elisabeth J. S. Kunkel MD 《Current psychiatry reports》2006,8(3):228-233
Anxiety disorders and anxiety symptoms are highly prevalent in the general population and more so in the medically ill. They
have a number of negative consequences for these patients and may worsen the outcome of the medical illness and increase health
care utilization. In the evaluation of these patients, it is of paramount importance to identify the etiology of the anxiety
and, in particular, to differentiate primary from secondary anxiety. Management includes medications (especially benzodiazepines
and selective serotonin reuptake inhibitors) and psychotherapy (particularly cognitive-behavioral therapy). 相似文献
27.
28.
Twenty-five women receiving sedation for outpatient hysteroscopic polypectomy were injected with 0.25% bupivacaine 10 mL (paracervical group) and another 25 received the same volume of saline (control group) at the cervical fornix. Both groups were given target-controlled propofol sedation during the procedure. More propofol (mg/min) was needed for adequate anesthesia in the control group compared to the paracervical group (6.5 versus 4.6). In addition, the postoperative pain scores were lower in the paracervical group than in the control group. Hemodynamic changes and postoperative side effects were similar in the two groups. This prospective, randomized, double-blind, placebo-controlled study confirmed the effective use of paracervical blocks. This approach has the effect of reducing the amount of intraoperative propofol and decreasing postoperative pain in outpatient hysteroscopic surgery. 相似文献
29.
Tony R Cucuzzella Elva G Delport Nancy Kim Julie Marley Christine Pruitt Anton G Delport 《The spine journal》2006,6(4):364-369
BACKGROUND CONTEXT: Substantial variation exists regarding the use of sedation before interventional spine techniques. Patient preference should play an important role in decision making regarding the need for sedation. However, little is known about patients' anxiety levels before spinal injections and their perceptions about the necessity of sedation. PURPOSE: To determine patient perception for need for sedation before epidural steroid injections and zygapophyseal joint injections. STUDY DESIGN/SETTING: Survey of consecutive spinal injection patients in an outpatient spine center. PATIENT SAMPLE: 500 consecutive lumbar, thoracic, and cervical patients receiving spinal injections. OUTCOME MEASURES: A 12-item questionnaire assessing patients' perceived anxiety before to a spinal injection. METHODS: Subjects were given the questionnaire after their spinal injection. Percentages requesting sedation for a first and potential second procedure were assessed. Additionally, anxiety level and pain rating, location of injection, age, sex, and other medication use were analyzed to determine the effect on the request for sedation. RESULTS: 17% of patients questioned requested sedation before an injection, and 28% would request sedation if they were to have a second injection. CONCLUSIONS: Routine sedation before diagnostic and therapeutic injections is not necessary as the majority of patients would not request sedation before the procedure when given the option. However, in some patients sedation is indicated, and all patients would benefit from educational material on sedation before the injection. 相似文献
30.
The molecular and clinical impact of hepatocyte growth factor, its receptor, activators, and inhibitors in wound healing 总被引:1,自引:0,他引:1
Kevin Conway MRCS ; Patricia Price PhD ; Keith G. Harding FRCS ; Wen G. Jiang MD 《Wound repair and regeneration》2006,14(1):2-10
Wound healing involves a number of cellular and molecular events, many of which are controlled by soluble growth factors. In the process of healing, hepatocyte growth factor, a cytokine known to act as mitogen, motogen, and morphogen, has been postulated to play multiple roles during several stages of this complex biological process. Produced primarily by stromal fibroblasts, hepatocyte growth factor regulates angiogenesis, vascular permeability, cell migration, matrix deposition and degradation, and other biological processes. The current article discusses recent progress in understanding the multiple roles played by this growth factor in tissue repair. 相似文献