全文获取类型
收费全文 | 29898篇 |
免费 | 2217篇 |
国内免费 | 1024篇 |
专业分类
耳鼻咽喉 | 1339篇 |
儿科学 | 501篇 |
妇产科学 | 549篇 |
基础医学 | 1463篇 |
口腔科学 | 1420篇 |
临床医学 | 2590篇 |
内科学 | 2344篇 |
皮肤病学 | 196篇 |
神经病学 | 1716篇 |
特种医学 | 799篇 |
外国民族医学 | 15篇 |
外科学 | 10769篇 |
综合类 | 4452篇 |
现状与发展 | 2篇 |
预防医学 | 1272篇 |
眼科学 | 659篇 |
药学 | 1255篇 |
43篇 | |
中国医学 | 282篇 |
肿瘤学 | 1473篇 |
出版年
2024年 | 34篇 |
2023年 | 648篇 |
2022年 | 797篇 |
2021年 | 1250篇 |
2020年 | 1471篇 |
2019年 | 1264篇 |
2018年 | 1197篇 |
2017年 | 1175篇 |
2016年 | 1173篇 |
2015年 | 1069篇 |
2014年 | 2131篇 |
2013年 | 2053篇 |
2012年 | 1676篇 |
2011年 | 2032篇 |
2010年 | 1803篇 |
2009年 | 1724篇 |
2008年 | 1588篇 |
2007年 | 1633篇 |
2006年 | 1418篇 |
2005年 | 1306篇 |
2004年 | 1009篇 |
2003年 | 864篇 |
2002年 | 759篇 |
2001年 | 545篇 |
2000年 | 358篇 |
1999年 | 289篇 |
1998年 | 261篇 |
1997年 | 238篇 |
1996年 | 198篇 |
1995年 | 170篇 |
1994年 | 124篇 |
1993年 | 104篇 |
1992年 | 107篇 |
1991年 | 82篇 |
1990年 | 63篇 |
1989年 | 68篇 |
1988年 | 72篇 |
1987年 | 50篇 |
1986年 | 41篇 |
1985年 | 64篇 |
1984年 | 49篇 |
1983年 | 31篇 |
1982年 | 50篇 |
1981年 | 31篇 |
1980年 | 20篇 |
1979年 | 14篇 |
1978年 | 7篇 |
1977年 | 11篇 |
1976年 | 6篇 |
1973年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
ABSTRACTGrowing trees on farmland continues to be a promising land-use option for smallholders in Indonesia as they look to diversify their enterprises beyond the main agricultural sector. While most smallholders integrate trees into their farming systems, selling timber and other tree products has usually been infrequent and opportunistic. Because of this infrequent trade, most smallholders rarely adopt silvicultural practices that would increase the commercial value of their trees. A research project trialled an alternative approach to forestry extension in Indonesia, known as the Master TreeGrower (MTG) training course. The MTG training courses used a farmer-centred approach to teach smallholders about forest science and took participants to market hubs so they could better understand how different forest products were valued by traders. The MTG training approach was trialled in 2014 in five districts in Indonesia and involved 118 smallholders and 27 non-farmers as course participants. This article reports on a recent evaluation of the MTG training courses held about three years earlier to explore the enduring impacts of the training approach and whether it can be scaled-out to other areas of Indonesia. The evaluation data were collected via focus group discussions (FGDs), in-depth interviews, household surveys and observations at three project sites: Pati (Central Java), Gunungkidul (Yogyakarta) and Bulukumba (South Sulawesi). A questionnaire was distributed among the participants of the FGDs to assess the extent different knowledge and skills of tree management that had been adopted by them following the MTG courses. The evaluation of the MTG approach revealed that the courses were effective in increasing smallholders’ knowledge of commercial forestry and their silvicultural skills. Many participants were more active with silviculture and planned to invest further in commercial forestry following the MTG training. In effect, the MTG training appeared to change the hearts and minds of the farmers about how commercial forestry could enhance their livelihoods. 相似文献
62.
�� ʢ�����Ӿ������� 《中国实用外科杂志》2019,39(2):143-145
肝门部胆管狭窄通常分为恶性狭窄和良性狭窄。如何有效处理肝门部胆管狭窄一直是胆道外科中的重点与难点。由于其涉及胆管系统、肝动脉系统、门静脉系统以及肝脏实质等,因此,对手术路径的选择至关重要。基于围肝门技术的肝门入路术式,能更好的显露肝门区各管道的解剖,并行精准处理,从而有效提高肝门部胆管癌的手术根治率,降低胆管狭窄的手术难度及手术风险。 相似文献
63.
65.
66.
67.
Rachel P. Winograd Ned Presnall Erin Stringfellow Claire Wood Phil Horn Alex Duello 《The American journal of drug and alcohol abuse》2019,45(4):333-340
Background: The opioid addiction and overdose crisis continues to ravage communities across the U.S. Maintenance pharmacotherapy using buprenorphine or methadone is the most effective intervention for Opioid Use Disorder (OUD), yet few have immediate and sustained access to these medications. Objectives: To address lack of medication access for people with OUD, the Missouri Department of Mental Health began implementing a Medication First (Med First) treatment approach in its publicly-funded system of comprehensive substance use disorder treatment programs. Methods: This Perspective describes the four principles of Med First, which are based on evidence-based guidelines. It draws conceptual comparisons between the Housing First approach to chronic homelessness and the Med First approach to pharmacotherapy for OUD, and compares state certification standards for substance use disorder (SUD) treatment (the traditional approach) to Med First guidelines for OUD treatment. Finally, the Perspective details how Med First principles have been practically implemented. Results: Med First principles emphasize timely access to maintenance pharmacotherapy without requiring psychosocial services or discontinuation for any reason other than harm to the client. Early results regarding medication utilization and treatment retention are promising. Feedback from providers has been largely favorable, though clinical- and system-level obstacles to effective OUD treatment remain. Conclusion: Like the Housing First model, Medication First is designed to decrease human suffering and activate the strengths and capacities of people in need. It draws on decades of research and facilitates partnerships between psychosocial and medical treatment providers to offer effective and life-saving care to persons with OUD. 相似文献
68.
69.
70.
Yavuz Şahbat MD Omer Buyuktopcu MD Osman Mert Topkar MD Bulent Erol MD 《Journal of surgical oncology》2020,122(4):594-601
The new measures implemented in hospitals also altered the operation of orthopedics and traumatology departments. The main purpose of this article is to discuss how orthopedic oncology clinics should be organized during the pandemic and to present the process management scheme for patients requiring orthopedic surgery, including trauma surgery, from diagnosis to treatment, together with our experiences. Instead of thinking about the global emergence of the epidemic, it is time to act decisively. At first glance, the coronavirus disease 2019 (COVID-19) pandemic and orthopedics may seem to be unrelated disciplines, but the provision of healthcare services to patients who require them proves that these two fields are parts of the same whole. Our experiences in treating neutropenic, lymphocytopenic, and chemotherapy patients seem to have proven beneficial during this process. We operated on 10 biopsy patients, 15 primary bone sarcomas, 9 soft tissue sarcomas, and 82 trauma patients within this time frame. Only three patients were suspected to have COVID-19 before admission. The early identification, strict isolation, and effective treatment of these patients prevented any nosocomial infections and disease-related comorbidities. This success is the result of the multidisciplinary cooperation of the Ministry of Health, our hospital, and our clinic. 相似文献