全文获取类型
收费全文 | 1628657篇 |
免费 | 136020篇 |
国内免费 | 3898篇 |
专业分类
耳鼻咽喉 | 22004篇 |
儿科学 | 53445篇 |
妇产科学 | 46754篇 |
基础医学 | 231227篇 |
口腔科学 | 47706篇 |
临床医学 | 144089篇 |
内科学 | 319468篇 |
皮肤病学 | 34741篇 |
神经病学 | 132035篇 |
特种医学 | 65670篇 |
外国民族医学 | 487篇 |
外科学 | 247461篇 |
综合类 | 43639篇 |
现状与发展 | 7篇 |
一般理论 | 562篇 |
预防医学 | 124645篇 |
眼科学 | 37519篇 |
药学 | 123604篇 |
22篇 | |
中国医学 | 4023篇 |
肿瘤学 | 89467篇 |
出版年
2018年 | 15769篇 |
2016年 | 13792篇 |
2015年 | 16204篇 |
2014年 | 22089篇 |
2013年 | 32735篇 |
2012年 | 44673篇 |
2011年 | 46962篇 |
2010年 | 27585篇 |
2009年 | 26342篇 |
2008年 | 44518篇 |
2007年 | 46775篇 |
2006年 | 47572篇 |
2005年 | 46193篇 |
2004年 | 45184篇 |
2003年 | 43128篇 |
2002年 | 42123篇 |
2001年 | 76312篇 |
2000年 | 79003篇 |
1999年 | 67044篇 |
1998年 | 18135篇 |
1997年 | 16666篇 |
1996年 | 16571篇 |
1995年 | 16272篇 |
1994年 | 15282篇 |
1993年 | 14364篇 |
1992年 | 55672篇 |
1991年 | 54013篇 |
1990年 | 52786篇 |
1989年 | 51041篇 |
1988年 | 47399篇 |
1987年 | 46710篇 |
1986年 | 44428篇 |
1985年 | 42958篇 |
1984年 | 32119篇 |
1983年 | 27621篇 |
1982年 | 16186篇 |
1981年 | 14475篇 |
1980年 | 13592篇 |
1979年 | 30511篇 |
1978年 | 21108篇 |
1977年 | 17804篇 |
1976年 | 16732篇 |
1975年 | 17605篇 |
1974年 | 21536篇 |
1973年 | 20728篇 |
1972年 | 18908篇 |
1971年 | 17802篇 |
1970年 | 16321篇 |
1969年 | 15303篇 |
1968年 | 13970篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Xin Yi Wong Andrew Qi Jun Lim Qianyu Shen John Whay Kuang Chia Min Hoe Chew Wah Siew Tan 《Current medical research and opinion》2020,36(10):1677-1686
Abstract
Objective
Ras wild-type metastatic colorectal cancers (mCRC) may be treated with anti-vascular endothelial growth factor (VEGF) or anti-epidermal growth factor receptor (EGFR) agents. We aim to estimate patients’ preferences for mCRC treatment and relative importance of cost, efficacy improvement, avoidance of side effects and therapy convenience, and relative uptake between profiles that resemble Bevacizumab (anti-VEGF) and Cetuximab (anti-EGFR), two commonly prescribed mCRC targeted therapies. 相似文献53.
54.
55.
56.
57.
58.
The objective of this study was to investigate short segment decompression of degenerative lumbar scoliosis (DLS) and the efficiency of fusion treatment.After DLS surgery, the patients were retrospectively reviewed using the VAS (visual analog scale) and ODI (Oswestry Disability Index) to assess clinical outcomes. All patients underwent posterior lumbar decompressive laminectomy, pedicle screw internal fixation, and posterolateral bone graft fusion surgery. Radiographic measurements included the scoliotic Cobb angle, the fused Cobb angle, the anterior intervertebral angle (AIA), the sagittal intervertebral angle (SIA), and lumbar lordosis angle. The relationships between these parameters were examined by bivariate Pearson analysis and linear regression analysis.Preoperatively, the Cobb angle at the scoliotic segment was 15.4°, which decreased to 10.2° immediately following surgery (P < 0.05). The AIA significantly increased by the last follow-up (4.4 ± 3.4) compared with pre- and postoperative values (2.5 ± 2.8 and 2.2 ± 2.4, respectively; P < 0.05). However, the scoliotic Cobb angle and the AIA did not correlate with the VAS or ODI scores. At the final follow-up, no patients had pseudoarthrosis or internal instrumentation-related complications.Short fusion surgical treatment results in limited DLS correction, with correction loss over time. The AIA between the upper adjacent segment and proximal fused vertebra continues to increase postoperatively, which does not exacerbate clinical symptoms, as reflected by the low reoperation rates for repairing degeneration at adjacent levels. 相似文献
59.
Past research suggests that as many as 50% of onward human immunodeficiency virus (HIV) transmissions occur during acute and recent HIV infection. It is clearly important to develop interventions which focus on this highly infectious stage of HIV infection to prevent further transmission in the risk networks of acutely and recently infected individuals. Project Protect tries to find recently and acutely infected individuals and prevents HIV transmission in their risk networks. Participants are recruited by community health outreach workers at community-based HIV testing sites and drug users' community venues, by coupon referrals and through referrals from AIDS clinics. When a network with acute/recent infection is identified, network members are interviewed about their risky behaviors, network information is collected, and blood is drawn for HIV testing. Participants are also educated and given prevention materials (condoms, syringes, educational materials); HIV-infected participants are referred to AIDS clinics and are assisted with access to care. Community alerts about elevated risk of HIV transmission are distributed within the risk networks of recently infected. Overall, 342 people were recruited to the project and screened for acute/recent HIV infection. Only six index cases of recent infection (2.3% of all people screened) were found through primary screening at voluntary counseling and testing (VCT) sites, but six cases of recent infection were found through contact tracing of these recently infected participants (7% of network members who came to the interview). Combining screening at VCT sites and contact tracing the number of recently infected people we located as compared to VCT screening alone. No adverse events were encountered. These first results provide evidence for the theory behind the intervention, i.e., in the risk networks of recently infected people there are other people with recent HIV infection and they can be successfully located without increasing stigma for project participants. 相似文献
60.