全文获取类型
收费全文 | 15890篇 |
免费 | 1545篇 |
国内免费 | 34篇 |
专业分类
耳鼻咽喉 | 162篇 |
儿科学 | 543篇 |
妇产科学 | 355篇 |
基础医学 | 2041篇 |
口腔科学 | 375篇 |
临床医学 | 1788篇 |
内科学 | 2924篇 |
皮肤病学 | 175篇 |
神经病学 | 1588篇 |
特种医学 | 604篇 |
外科学 | 2367篇 |
综合类 | 409篇 |
一般理论 | 20篇 |
预防医学 | 1608篇 |
眼科学 | 395篇 |
药学 | 1201篇 |
中国医学 | 10篇 |
肿瘤学 | 904篇 |
出版年
2021年 | 252篇 |
2020年 | 178篇 |
2019年 | 312篇 |
2018年 | 348篇 |
2017年 | 267篇 |
2016年 | 283篇 |
2015年 | 337篇 |
2014年 | 426篇 |
2013年 | 605篇 |
2012年 | 924篇 |
2011年 | 916篇 |
2010年 | 491篇 |
2009年 | 412篇 |
2008年 | 786篇 |
2007年 | 821篇 |
2006年 | 821篇 |
2005年 | 747篇 |
2004年 | 780篇 |
2003年 | 638篇 |
2002年 | 669篇 |
2001年 | 417篇 |
2000年 | 412篇 |
1999年 | 354篇 |
1998年 | 174篇 |
1997年 | 149篇 |
1996年 | 135篇 |
1995年 | 112篇 |
1994年 | 140篇 |
1993年 | 142篇 |
1992年 | 336篇 |
1991年 | 281篇 |
1990年 | 247篇 |
1989年 | 236篇 |
1988年 | 225篇 |
1987年 | 238篇 |
1986年 | 216篇 |
1985年 | 208篇 |
1984年 | 166篇 |
1983年 | 134篇 |
1982年 | 102篇 |
1981年 | 107篇 |
1980年 | 114篇 |
1979年 | 118篇 |
1978年 | 106篇 |
1977年 | 102篇 |
1976年 | 109篇 |
1974年 | 102篇 |
1973年 | 117篇 |
1972年 | 115篇 |
1971年 | 87篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Mursheda Begum Grant Lewison Xiang Wang Philip D. Dunne Tim Maughan Richard Sullivan Mark Lawler 《International journal of cancer. Journal international du cancer》2023,152(3):470-479
The purpose of this study was to provide an evidence base for colorectal cancer research activity that might influence policy, mainly at the national level. Improvements in healthcare delivery have lengthened life expectancy, but within a situation of increased cancer incidence. The disease burden of CRC has risen significantly, particularly in Africa, Asia and Latin America. Research is key to its control and reduction, but few studies have delineated the volume and funding of global research on CRC. We identified research papers in the Web of Science (WoS) from 2007 to 2021, and determined the contributions of the leading countries, the research domains studied, and their sources of funding. We identified 62 716 papers, representing 5.7% of all cancer papers. This percentage was somewhat disproportionate to the disease burden (7.7% in 2015), especially in Eastern Europe. International collaboration increased over the time period in almost all countries except in China. Genetics, surgery and prognosis were the leading research domains. However, research on palliative care and quality-of-life in CRC was lacking. In Western Europe, the main funding source was the charity sector, particularly in the UK, but in most other countries government played the leading role, especially in China and the USA. There was little support from industry. Several Asian countries provided minimal contestable funding, which may have reduced the impact of their CRC research. Certain countries must perform more CRC research overall, especially in domains such as screening, palliative care and quality-of-life. The private-non-profit sector should be an alternative source of support. 相似文献
2.
Cheryl L. Rock PhD RD Cynthia A. Thomson PhD RD Kristen R. Sullivan MS MPH Carol L. Howe MD MLS Lawrence H. Kushi ScD Bette J. Caan DrPH Marian L. Neuhouser PhD RD Elisa V. Bandera MD PhD Ying Wang PhD Kimberly Robien PhD RD Karen M. Basen-Engquist PhD MPH Justin C. Brown PhD Kerry S. Courneya PhD Tracy E. Crane PhD RDN David O. Garcia PhD FACSM Barbara L. Grant MS RDN CSO FAND Kathryn K. Hamilton MA RDN CSO CDN FAND Sheri J. Hartman PhD Stacey A. Kenfield ScD Maria Elena Martinez PhD Jeffrey A. Meyerhardt MD MPH Larissa Nekhlyudov MD MPH Linda Overholser MD Alpa V. Patel PhD Bernardine M. Pinto PhD Mary E. Platek PhD RD CDN Erika Rees-Punia PhD MPH Colleen K. Spees PhD MEd RD LD FAND Susan M. Gapstur PhD Marjorie L. McCullough ScD RD 《CA: a cancer journal for clinicians》2022,72(3):230-262
The overall 5-year relative survival rate for all cancers combined is now 68%, and there are over 16.9 million survivors in the United States. Evidence from laboratory and observational studies suggests that factors such as diet, physical activity, and obesity may affect risk for recurrence and overall survival after a cancer diagnosis. The purpose of this American Cancer Society guideline is to provide evidence-based, cancer-specific recommendations for anthropometric parameters, physical activity, diet, and alcohol intake for reducing recurrence and cancer-specific and overall mortality. The audiences for this guideline are health care providers caring for cancer survivors as well as cancer survivors and their families. The guideline is intended to serve as a resource for informing American Cancer Society programs, health policy, and the media. Sources of evidence that form the basis of this guideline are systematic literature reviews, meta-analyses, pooled analyses of cohort studies, and large randomized clinical trials published since 2012. Recommendations for nutrition and physical activity during cancer treatment, informed by current practice, large cancer care organizations, and reviews of other expert bodies, are also presented. To provide additional context for the guidelines, the authors also include information on the relationship between health-related behaviors and comorbidities, long-term sequelae and patient-reported outcomes, and health disparities, with attention to enabling survivors' ability to adhere to recommendations. Approaches to meet survivors' needs are addressed as well as clinical care coordination and resources for nutrition and physical activity counseling after a cancer diagnosis. 相似文献
3.
Ashton A. Connor Robert E. Denroche Gun Ho Jang Mathieu Lemire Amy Zhang Michelle Chan-Seng-Yue Gavin Wilson Robert C. Grant Daniele Merico Ilinca Lungu John M.S. Bartlett Dianne Chadwick Sheng-Ben Liang Jenna Eagles Faridah Mbabaali Jessica K. Miller Paul Krzyzanowski Heather Armstrong Steven Gallinger 《Cancer cell》2019,35(2):267-282.e7
4.
Krishnan Radhakrishnan Mihaela Aslan Kelly M. Harrington Robert H. Pietrzak Grant Huang Sumitra Muralidhar Kelly Cho Rachel Quaden David Gagnon Saiju Pyarajan Ning Sun Hongyu Zhao Michael Gaziano John Concato Murray B. Stein Joel Gelernter 《International journal of methods in psychiatric research》2019,28(1)
5.
James Bowness Katie Turnbull Alasdair Taylor Jayne Halcrow Fraser Chisholm Calum Grant Ourania Varsou 《Clinical anatomy (New York, N.Y.)》2019,32(3):390-395
Regional anesthesia relies on a sound understanding of anatomy and the utility of ultrasound in identifying relevant structures. We assessed the ability to identify the point at which the superficial peroneal nerve (SPN) emerges through the deep fascia by ultrasound on 26 volunteers (mean age 27.85 years ± 13.186; equal male: female). This point was identified, characterized in relation to surrounding bony landmarks (lateral malleolus and head of the fibula), and compared to data from 16 formalin‐fixed human cadavers (mean age 82.88 years ± 6.964; equal male: female). The SPN was identified bilaterally in all subjects. On ultrasound it was found to pierce the deep fascia of the leg at a point 0.31 (±0.066) of the way along a straight line from the lateral malleolus to the head of the fibula (LM‐HF line). This occurred on or anterior to the line in all cases. Dissection of cadavers found this point to be 0.30 (±0.062) along the LM‐HF line, with no statistically significant difference between the two groups (U = 764.000; exact two‐tailed P = 0.534). It was always on or anterior to the LM‐HF line, anterior by 0.74 cm (±0.624) on ultrasound and by 1.51 cm (±0.509) during dissection. This point was significantly further anterior to the LM‐HF line in cadavers (U = 257.700, exact two‐tailed P < 0.001). Dissection revealed the nerve to divide prior to emergence in 46.88% (n = 15) limbs, which was not identified on ultrasound (although not specifically assessed). Such information can guide clinicians when patient factors (e.g., obesity and peripheral edema) make ultrasound‐guided nerve localization more technically challenging. Clin. Anat. 32:390–395, 2019. © 2019 Wiley Periodicals, Inc. 相似文献
6.
Murat Yücel Erin Oldenhof Serge H. Ahmed David Belin Joel Billieux Henrietta Bowden‐Jones Adrian Carter Samuel R. Chamberlain Luke Clark Jason Connor Mark Daglish Geert Dom Pinhas Dannon Theodora Duka Maria Jose Fernandez‐Serrano Matt Field Ingmar Franken Rita Z. Goldstein Raul Gonzalez Anna E. Goudriaan Jon E. Grant Matthew J. Gullo Robert Hester David C. Hodgins Bernard Le Foll Rico S. C. Lee Anne Lingford‐Hughes Valentina Lorenzetti Scott J. Moeller Marcus R. Munaf Brian Odlaug Marc N. Potenza Rebecca Segrave Zsuzsika Sjoerds Nadia Solowij Wim van den Brink Ruth J. van Holst Valerie Voon Reinout Wiers Leonardo F. Fontenelle Antonio Verdejo‐Garcia 《Addiction (Abingdon, England)》2019,114(6):1095-1109
7.
Ghabriel Mounir Takezawa Kojiro Townsend Grant 《Odontology / the Society of the Nippon Dental University》2019,107(1):1-9
Odontology - This article, for both researchers and clinicians, presents an overview of the lingual nerve and highlights how new insights into human anatomical variability can be gained by... 相似文献
8.
9.
Reflectance confocal microscopy may enhance the accuracy of histopathologic diagnosis: A case series
Neda Shahriari Jane M. Grant‐Kels Harold Rabinovitz Margaret Oliviero Alon Scope 《Journal of cutaneous pathology》2019,46(11):830-838
Although histopathology is the time‐honored gold standard diagnostic measure in dermatology, several factors may detract from an accurate microscopic diagnosis. Limiting factors include: human error, suboptimal biopsy‐site selection or biopsy technique, and inherent restrictions of vertical tissue sectioning that lead to incomplete microscopic evaluation of the lesion. Reflectance confocal microscopy (RCM) is a non‐invasive imaging tool that allows for the cellular‐level examination of the lesion, at a horizontal plane, which may complement the subsequent vertical histopathological tissue examination. Herein, we report a case series whereby prebiopsy RCM examination enhanced the accuracy of histopathological diagnosis or allowed for a critical appraisal of initial histopathological misdiagnosis. 相似文献
10.
Francis I. Baffour Michael R. Moynagh Patrick W. Eiken Brian T. Welch A. Nicholas Kurup Thomas D. Atwell Grant D. Schmit 《Journal of vascular and interventional radiology : JVIR》2019,30(1):82-86