全文获取类型
收费全文 | 450449篇 |
免费 | 50188篇 |
国内免费 | 2772篇 |
专业分类
耳鼻咽喉 | 9373篇 |
儿科学 | 15749篇 |
妇产科学 | 12731篇 |
基础医学 | 49079篇 |
口腔科学 | 9144篇 |
临床医学 | 51165篇 |
内科学 | 103442篇 |
皮肤病学 | 13740篇 |
神经病学 | 36387篇 |
特种医学 | 18052篇 |
外国民族医学 | 43篇 |
外科学 | 88104篇 |
综合类 | 8311篇 |
现状与发展 | 73篇 |
一般理论 | 168篇 |
预防医学 | 27755篇 |
眼科学 | 10424篇 |
药学 | 22501篇 |
1篇 | |
中国医学 | 801篇 |
肿瘤学 | 26366篇 |
出版年
2023年 | 5125篇 |
2021年 | 5313篇 |
2020年 | 7319篇 |
2019年 | 4441篇 |
2018年 | 11009篇 |
2017年 | 9976篇 |
2016年 | 11418篇 |
2015年 | 11818篇 |
2014年 | 19970篇 |
2013年 | 22811篇 |
2012年 | 14911篇 |
2011年 | 15324篇 |
2010年 | 16594篇 |
2009年 | 19839篇 |
2008年 | 14982篇 |
2007年 | 14096篇 |
2006年 | 16338篇 |
2005年 | 13224篇 |
2004年 | 12267篇 |
2003年 | 10649篇 |
2002年 | 10343篇 |
2001年 | 17124篇 |
2000年 | 16635篇 |
1999年 | 14663篇 |
1998年 | 6702篇 |
1997年 | 6309篇 |
1996年 | 6025篇 |
1995年 | 5780篇 |
1994年 | 4325篇 |
1993年 | 3787篇 |
1992年 | 9682篇 |
1991年 | 9878篇 |
1990年 | 9328篇 |
1989年 | 9265篇 |
1988年 | 8353篇 |
1987年 | 7935篇 |
1986年 | 7625篇 |
1985年 | 7244篇 |
1984年 | 5332篇 |
1983年 | 4685篇 |
1982年 | 3037篇 |
1979年 | 4766篇 |
1978年 | 3587篇 |
1977年 | 3142篇 |
1975年 | 3127篇 |
1974年 | 3587篇 |
1973年 | 3616篇 |
1972年 | 3425篇 |
1971年 | 3159篇 |
1970年 | 3097篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
Gastro-oesophageal reflux disease (GORD) is symptomatic reflux of gastric contents into the oesophagus. Factors predisposing to GORD are loss of the physiological antireflux barrier and anatomic abnormalities of the oesophagus or diaphragm. Conservative measures and medical management results in resolution of symptoms in a majority of children. Surgery is indicated in the event of failure of medical management or severe complications. Surgical procedures include open or laparoscopic fundoplication in children with normal neurology; fundoplication with or without vagotomy and pyloroplasty; surgical feeding jejunostomy and oesophago-gastric dissociation in the severely neurologically impaired children. 相似文献
72.
The term “oligometastatic prostate cancer” refers to a heterogeneous group of disease states currently defined solely on the basis of clinical features. Oligorecurrent disease, de novo oligometastases, and oligoprogressive disease likely have unique biologic underpinnings and natural histories. Evidence suggesting the existence of a subset of patients who harbor prostate cancer with limited metastatic potential currently includes disparate and overwhelmingly retrospective reports. Nevertheless, emerging prospective data have corroborated the “better-than-expected,” retrospectively observed outcomes, particularly in the setting of oligorecurrent prostate cancer. Improved functional imaging with prostate-specific membrane antigen-targeted strategies may enhance the identification of patients with oligometastatic prostate cancer in the short term. In the long term, refinement of the oligometastatic case definition likely will require biologic risk-stratification schemes. To determine optimal treatment strategies and identify patients most likely to benefit from metastasis-directed therapy, future efforts should focus on conducting high-quality, prospective trials with much-needed molecular correlative studies. 相似文献
73.
74.
75.
O.R. Mitchell R. Dave J. Bekker P.A. Brennan 《The British journal of oral & maxillofacial surgery》2021,59(3):384-385
The first COVID-19 vaccination was given in December 2020 and there is an effort to vaccinate the international population on a massive scale. Common side effects from the vaccine include headache and tiredness. Regional lymphadenopathy has been described in relation to other vaccines. We describe two cases of supraclavicular reactive lymphadenopathy presenting in patients who had the COVID vaccination in the ipsilateral arm. Awareness of this diagnosis is important for patients presenting to the neck lump clinic. 相似文献
76.
Chumakov E. M. Petrova N. N. Limankin O. V. Ashenbrenner Yu. V. 《Neuroscience and behavioral physiology》2022,52(1):45-51
Neuroscience and Behavioral Physiology - Objective. To determine the frequency, structure, and severity of cognitive impairments in patients with bipolar affective disorder (BAD) in remission.... 相似文献
77.
78.
79.
O. Morris M. Fairclough J. Grigg C. Prenant A. McMahon 《Journal of labelled compounds & radiopharmaceuticals》2019,62(1):4-23
Affinity peptide and protein‐ (APP) based radiotracers are an increasingly popular class of radiotracer in positron emission tomography (PET), which was once dominated by the use of small molecule radiotracers. Radiolabelled monoclonal antibodies (mAbs) are important examples of APPs, yet a preference for smaller APPs, which exhibit fast pharmacokinetics and permit rapid PET aided diagnosis, has become apparent. 18F exhibits favourable physical characteristics for APP radiolabelling and has been described as an ideal PET radionuclide. Notwithstanding, 18F radiolabelling of APP is challenging, and this is echoed in the literature where a number of diverse approaches have been adopted. This review seeks to assess and compare the approaches taken to 18F APP radiolabelling with the intention of highlighting trends within this expanding field. Generic themes have emerged in the literature, namely the use of mild radiolabelling conditions, a preference of site‐specific methodologies with an impetus for short, automated procedures which produce high‐yielding [18F]APPs. 相似文献