全文获取类型
收费全文 | 3649篇 |
免费 | 272篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 32篇 |
儿科学 | 78篇 |
妇产科学 | 43篇 |
基础医学 | 476篇 |
口腔科学 | 114篇 |
临床医学 | 491篇 |
内科学 | 634篇 |
皮肤病学 | 67篇 |
神经病学 | 279篇 |
特种医学 | 136篇 |
外科学 | 642篇 |
综合类 | 49篇 |
一般理论 | 1篇 |
预防医学 | 305篇 |
眼科学 | 101篇 |
药学 | 206篇 |
中国医学 | 5篇 |
肿瘤学 | 273篇 |
出版年
2024年 | 3篇 |
2023年 | 24篇 |
2022年 | 31篇 |
2021年 | 103篇 |
2020年 | 47篇 |
2019年 | 97篇 |
2018年 | 110篇 |
2017年 | 77篇 |
2016年 | 84篇 |
2015年 | 76篇 |
2014年 | 146篇 |
2013年 | 215篇 |
2012年 | 276篇 |
2011年 | 316篇 |
2010年 | 198篇 |
2009年 | 145篇 |
2008年 | 277篇 |
2007年 | 256篇 |
2006年 | 244篇 |
2005年 | 262篇 |
2004年 | 234篇 |
2003年 | 217篇 |
2002年 | 202篇 |
2001年 | 27篇 |
2000年 | 20篇 |
1999年 | 29篇 |
1998年 | 27篇 |
1997年 | 21篇 |
1996年 | 12篇 |
1995年 | 14篇 |
1994年 | 17篇 |
1993年 | 15篇 |
1992年 | 5篇 |
1991年 | 7篇 |
1990年 | 4篇 |
1989年 | 13篇 |
1988年 | 12篇 |
1987年 | 8篇 |
1985年 | 7篇 |
1984年 | 7篇 |
1983年 | 5篇 |
1982年 | 10篇 |
1981年 | 3篇 |
1980年 | 5篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1971年 | 3篇 |
1970年 | 3篇 |
1969年 | 3篇 |
1940年 | 2篇 |
排序方式: 共有3932条查询结果,搜索用时 15 毫秒
81.
Certain common oral lesions appear as masses, prompting concern about oral carcinoma. Many are benign, although some (e.g., leukoplakia) may represent neoplasia or cancer. Palatal and mandibular tori are bony protuberances and are benign anomalies. Oral pyogenic granulomas may appear in response to local irritation, trauma, or hormonal changes of pregnancy. Mucoceles represent mucin spillage into the oral soft tissues resulting from rupture of a salivary gland duct. Oral fibromas form as a result of irritation or masticatory trauma, especially along the buccal occlusal line. Oral cancer may appear clinically as a subtle mucosal change or as an obvious mass. Oral leukoplakia is the most common premalignant oral lesion. For persistent white or erythematous oral lesions, biopsy should be performed to rule out neoplastic change or cancer. Most oral cancers are squamous cell carcinomas. Tobacco and heavy alcohol use are the principal risk factors for oral cancer. Family physicians should be able to recognize these lesions and make appropriate referrals for biopsy and treatment. 相似文献
82.
83.
Afton K. Limberg Meagan E. Tibbo Christopher G. Salib Alex R. McLaury Travis W. Turner Charlotte E. Berry Anthony G. Jay Jodi M. Carter Brad Bolon Daniel J. Berry Mark E. Morrey Joaquin Sanchez-Sotelo Andre J. van Wijnen Matthew P. Abdel 《Journal of orthopaedic research》2020,38(11):2474-2483
The dense formation of abnormal scar tissue after total knee arthroplasty results in arthrofibrosis, an unfortunate sequela of inflammation. The purpose of this study was to use a validated rabbit model to assess the effects on surgically-induced knee joint contractures of two combined pharmacological interventions: celecoxib (CXB) loaded on an implanted collagen membrane, and subcutaneously (SQ) injected ketotifen. Thirty rabbits were randomly divided into five groups. The first group received no intervention after the index surgery. The remaining four groups underwent intra-articular implantation of collagen membranes loaded with or without CXB at the time of the index surgery; two of which were also treated with SQ ketotifen. Biomechanical joint contracture data were collected at 8, 10, 16, and 24 weeks. At the time of necropsy (24 weeks), posterior capsule tissue was collected for messenger RNA and histopathologic analyses. At 24 weeks, there was a statistically significant increase in passive extension among rabbits in all groups treated with CXB and/or ketotifen compared to those in the contracture control group. There was a statistically significant decrease in COL3A1, COL6A1, and ACTA2 gene expression in the treatment groups compared to the contracture control group (P < .001). Histopathologic data also demonstrated a trend towards decreased fibrous tissue density in the CXB membrane group compared to the vehicle membrane group. The present data suggest that intra-articular placement of a treated collagen membrane blunts the severity of contracture development in a rabbit model of arthrofibrosis, and that ketotifen and CXB may independently contribute to the prevention of arthrofibrosis. Statement of clinical significance: Current literature has demonstrated that arthrofibrosis may affect up to 5% of primary total knee arthroplasty patients. For that reason, novel pharmacologic prophylaxis and treatment modalities are critical to mitigating reoperations and revisions while improving the quality of life for patients with this debilitating condition. 相似文献
84.
85.
Candace H. Feldman Cameron Speyer Rachel Ashby Bonnie L. Bermas Shamik Bhattacharyya Eliza Chakravarty Brendan Everett Elizabeth Ferucci Aimee O. Hersh Francisco M. Marty Joseph F. Merola Rosalind Ramsey‐Goldman Brad H. Rovin Mary Beth Son Laura Tarter Sushrut Waikar Jinoos Yazdany Joel S. Weissman Karen H. Costenbader 《Arthritis care & research》2021,73(1):146-157
86.
87.
Natasha A. Spassiani Brad A. Meisner Megan S. Abou Chacra Tamar Heller Joy Hammel 《Journal of Applied Research in Intellectual Disabilities》2019,32(6):1465-1477
As people with intellectual and developmental disabilities (I/DD) age, it is important that I/DD agencies are prepared to support healthy ageing in homes and in communities. This study explored supports and barriers to sustaining community‐based health and participation initiatives (CBHPI) for people ageing with I/DD living in group homes managed by agencies. The study utilized interviews and photovoice with 70 participants—35 individuals with I/DD and 35 management/direct support agency staff. Data were analysed through content analysis and triangulation of data where five themes emerged: Agency values and policies related to healthy ageing; resources and staff competencies; communication between management and staff; community/university partnerships; and peer relations. Findings show that I/DD agencies and people with I/DD value CBHPI, but they find them difficult to sustain due to limited resources and lack of training specific to ageing with I/DD. Conducting system‐level research within I/DD agencies to include first‐person accounts of people with I/DD, staff and management provides insight on how to effectively support the needs of people with I/DD to improve their health and community participation as they age. 相似文献
88.
89.
90.
Jennifer Vehawn Rickelle Richards Joshua H. West P. Cougar Hall Benjamin T. Crookston Brad L. Neiger 《Journal of immigrant and minority health / Center for Minority Public Health》2014,16(4):699-705
The Special Supplemental Nutrition Program for Women, Infants and Children (WIC) is a program for low-income women and children under age five. The purpose of this study was to identify barriers to accessing online WIC resources among Latina WIC clients. Five focus groups were conducted with Spanish-speaking participants recruited from a single WIC clinic. Two key themes emerged relating to barriers in accessing WIC’s online resources. The first theme, access issues, included three subthemes: lack of computer/Internet resources; family barriers to computer use; and computer literacy. The second theme, perceived value of the website, included three subthemes: limited time savings; preference for on-site education; and knowledge about the website. This is the first study to evaluate barriers to accessing online resources among Latina women in the WIC program. WIC sites attempting to increase utilization of online resources may be more successful if they serve clients with easy access to a computer with Internet access. They may also consider strategies to increase the value of the online resources, as compared to their current services offered to clients in a face-to-face setting. 相似文献