全文获取类型
收费全文 | 348046篇 |
免费 | 11942篇 |
国内免费 | 1129篇 |
专业分类
耳鼻咽喉 | 3368篇 |
儿科学 | 10645篇 |
妇产科学 | 5821篇 |
基础医学 | 41974篇 |
口腔科学 | 5059篇 |
临床医学 | 28875篇 |
内科学 | 66216篇 |
皮肤病学 | 3979篇 |
神经病学 | 31745篇 |
特种医学 | 15343篇 |
外国民族医学 | 1篇 |
外科学 | 52934篇 |
综合类 | 4150篇 |
现状与发展 | 2篇 |
一般理论 | 173篇 |
预防医学 | 30969篇 |
眼科学 | 7172篇 |
药学 | 22481篇 |
1篇 | |
中国医学 | 1521篇 |
肿瘤学 | 28688篇 |
出版年
2023年 | 1032篇 |
2022年 | 2384篇 |
2021年 | 4405篇 |
2020年 | 2388篇 |
2019年 | 3686篇 |
2018年 | 25742篇 |
2017年 | 20140篇 |
2016年 | 22999篇 |
2015年 | 6124篇 |
2014年 | 7705篇 |
2013年 | 9689篇 |
2012年 | 20390篇 |
2011年 | 34115篇 |
2010年 | 25933篇 |
2009年 | 18096篇 |
2008年 | 30228篇 |
2007年 | 32531篇 |
2006年 | 11130篇 |
2005年 | 12475篇 |
2004年 | 12885篇 |
2003年 | 12897篇 |
2002年 | 10588篇 |
2001年 | 2801篇 |
2000年 | 2541篇 |
1999年 | 2275篇 |
1998年 | 1997篇 |
1997年 | 1661篇 |
1996年 | 1234篇 |
1995年 | 1214篇 |
1994年 | 1036篇 |
1993年 | 972篇 |
1992年 | 1029篇 |
1991年 | 1003篇 |
1990年 | 935篇 |
1989年 | 830篇 |
1988年 | 798篇 |
1987年 | 768篇 |
1986年 | 616篇 |
1985年 | 690篇 |
1984年 | 698篇 |
1983年 | 653篇 |
1982年 | 775篇 |
1981年 | 663篇 |
1980年 | 613篇 |
1979年 | 451篇 |
1978年 | 422篇 |
1977年 | 390篇 |
1976年 | 344篇 |
1975年 | 326篇 |
1974年 | 358篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
Daniel Klase Stefan Gottschalk Erich Reusche Christian Hagel Einar Goebel Volker Tronnier Alf Giese 《Child's nervous system》2007,23(8):907-912
CASE REPORT: The reported female patient underwent sub-total resection of an intra-medullary cervicothoracic astrocytoma classified as WHO grade II in 1984 at the age of 18 months and received local irradiation. In 1989, a local recurrence was diagnosed and a partial resection was performed. Sixteen years later, a small recurrent cervicothoracic tumour was found and spinal seeding to the equine nerve roots and the left cerebellar cortex was apparent on MRI. The patient was implanted with a ventriculoperitoneal shunt for a pseudo-tumour cerebri producing papilloedema, which eventually lead to amaurosis. After an extended biopsy, the invasive lumbosacral tumour was classified as glioblastoma multiforme. Two months later, the patient died after rapid progression of the caudal cranial nerve dysfunction. DISCUSSION AND CONCLUSION: Anaplastic progression and dissemination of spinal astrocytomas even two decades after initial diagnosis and treatment are rare. Therapies and diagnostic follow-up strategies are discussed. 相似文献
993.
994.
Jong Hun Kim Kwang-Yeol Park Sang Won Seo Duk L. Na Chin-Sang Chung Kwang Ho Lee Gyeong-Moon Kim 《JOURNAL OF CLINICAL NEUROLOGY》2007,3(1):62-66
The retrosplenial cortex is a cytoarchitecturally distinct brain structure located in the posterior cingulate gyrus and bordering the splenium, precuneus, and calcarine fissure. Functional imaging suggests that the retrosplenium is involved in memory, visuospatial processing, proprioception, and emotion.We report on a patient who developed reversible verbal and visual memory deficits following a stroke. Neuropsychological testing revealed both anterograde and retrograde memory deficits in verbal and visual modalities. Brain diffusion-weighted and T2-weighted magnetic resonance imaging (MRI) demonstrated an acute infarction of the left retrosplenium. 相似文献
995.
996.
997.
Susan Miesfeldt Christine Hayden Netta Apedoe Sharon Jerome Andrea Fletcher 《Journal of community health》2010,35(2):109-114
Over 800 Maine residents will be diagnosed with colorectal cancer (CRC) this year, and nearly 300 will die from the disease.
While CRC screening can reduce these rates, it is only among insured populations that screening rates exceed 50%. This project
aimed to reduce barriers to, and increase rates of CRC screening among underinsured and uninsured women, ages 50 years and
over, residing in Cumberland County, Maine. The existing network of the Maine Breast and Cervical Health Program (MBCHP) was
used to reach the target population. A packet containing (1) an offer for no-cost fecal occult blood test (FOBT) screening
and CRC-related educational materials, and (2) a stamped, addressed postcard specifying the woman’s interest in these resources,
was mailed to 300 MBCHP enrollees residing in Cumberland County. Women requesting screening were contacted by phone to further
determine eligibility. Ninety-three women (31%) requested FOBT kits and 29 of these women requested educational materials.
Ten women were ineligible for screening because of previous colonoscopy. Fifty-two completed FOBT kits (63%) were returned;
all were negative. An additional 42 (14%) women requested educational materials only. To reduce the burden of CRC in Maine
and nationally, disparate populations must be reached with efficient and effective screening services. Established networks
are proven means for reaching uninsured and underinsured individuals with education, screening services, and necessary follow-up
care. This project serves as a model for the future development of similar programs statewide and nationally. 相似文献
998.
Shirley A. Musich Alyssa B. Schultz Wayne N. Burton Dee W. Edington 《Disease Management & Health Outcomes》2004,12(5):299-326
Corporations have engaged in sponsorship of health management programs and, more recently, disease management programs to facilitate healthy and productive work environments. The purpose of this review is to examine the health and financial outcomes from these corporate-sponsored disease management programs. This article focuses on seven diseases or chronic conditions (arthritis, asthma, cancer, depression, diabetes mellitus, heart disease, and migraine) that potentially impact employee productivity (both in time away from work and in loss of effectiveness at work) and health status including medical and pharmaceutical utilization and costs.Corporate-sponsored disease management programs typically focus on education and screening for selected diseases or chronic conditions. Partnerships have been formed with health plans and third-party program providers to reach employees with interventions and treatment. The typical outcome measures from these programs have primarily been clinical indicators and medical utilization. Measures of productivity need to be incorporated as important outcome measures for disease management programs.The estimated financial opportunity for the corporation is a reflection of the cost differential for a given disease and the prevalence of that disease within the employee population. Primary diseases, chronic conditions, and health risks contribute to increased medical utilization and decreased productivity within the corporation. Promoting programs that focus on the whole person, including health risks, chronic conditions, and diseases, will likely increase the possibility of success in helping the employee to better self-manage their health conditions and consequently provide gains for both the individual and the corporation. 相似文献
999.
Fred Poordad Robert Gish Adil Wakil Richard Garcia-Kennedy Paul Martin Francis Y. Yao 《American journal of transplantation》2003,3(11):1413-1417
Non-alcoholic fatty liver disease (NAFLD) is an increasingly recognized clinico-pathologic entity typically associated with obesity, type II diabetes and hyperlipidemia. It has been noted to recur after orthotopic liver transplantation (OLT). We report four patients who developed de novo NAFLD within 3 months of OLT without the typical predisposing factors of diabetes mellitus or obesity. Three of the four patients underwent OLT for hepatitis C-related cirrhosis, and the other for alcoholic cirrhosis. Examination of the liver explants revealed no evidence of steatosis. No surreptitious alcohol use or a drug-induced process could be identified in these patients. Treatment of recurrent hepatitis C infection in one patient with interferon and ribavirin led to sustained suppression of the viral RNA to undetectable levels, but no improvement in histology or liver enzymes. All four patients had histologic evidence of preservation injury on the initial post-OLT biopsies, but the significance of this finding in relationship to the development of NAFLD is unknown. NAFLD can develop without any of the known predisposing conditions after transplantation, and this raises further questions about the pathogenesis of this condition . 相似文献
1000.