全文获取类型
收费全文 | 37874篇 |
免费 | 3162篇 |
国内免费 | 1420篇 |
专业分类
耳鼻咽喉 | 426篇 |
儿科学 | 910篇 |
妇产科学 | 445篇 |
基础医学 | 2825篇 |
口腔科学 | 1576篇 |
临床医学 | 4624篇 |
内科学 | 6600篇 |
皮肤病学 | 1161篇 |
神经病学 | 1632篇 |
特种医学 | 1711篇 |
外科学 | 2773篇 |
综合类 | 6635篇 |
现状与发展 | 10篇 |
一般理论 | 4篇 |
预防医学 | 5275篇 |
眼科学 | 910篇 |
药学 | 2625篇 |
27篇 | |
中国医学 | 1747篇 |
肿瘤学 | 540篇 |
出版年
2024年 | 96篇 |
2023年 | 755篇 |
2022年 | 1306篇 |
2021年 | 1927篇 |
2020年 | 1824篇 |
2019年 | 1391篇 |
2018年 | 1323篇 |
2017年 | 1251篇 |
2016年 | 1479篇 |
2015年 | 1307篇 |
2014年 | 2585篇 |
2013年 | 2729篇 |
2012年 | 2370篇 |
2011年 | 2543篇 |
2010年 | 2075篇 |
2009年 | 1959篇 |
2008年 | 1871篇 |
2007年 | 1876篇 |
2006年 | 1601篇 |
2005年 | 1494篇 |
2004年 | 1162篇 |
2003年 | 1040篇 |
2002年 | 869篇 |
2001年 | 843篇 |
2000年 | 665篇 |
1999年 | 500篇 |
1998年 | 485篇 |
1997年 | 394篇 |
1996年 | 278篇 |
1995年 | 352篇 |
1994年 | 291篇 |
1993年 | 192篇 |
1992年 | 218篇 |
1991年 | 196篇 |
1990年 | 157篇 |
1989年 | 165篇 |
1988年 | 149篇 |
1987年 | 143篇 |
1986年 | 114篇 |
1985年 | 93篇 |
1984年 | 72篇 |
1983年 | 42篇 |
1982年 | 44篇 |
1981年 | 28篇 |
1980年 | 29篇 |
1979年 | 37篇 |
1978年 | 22篇 |
1977年 | 26篇 |
1976年 | 25篇 |
1975年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 283 毫秒
31.
Diabetes mellitus(DM) negatively affects the development and progression of chronic liver diseases(CLD) of various etiologies. Concurrent DM and CLD are also associated with worse clinical outcomes with respect to mortality, the occurrence of hepatic decompensation, and the development of hepatocellular carcinoma(HCC). Unfortunately, early diagnosis and optimal treatment of DM can be challenging, due to the lack of established clinical guidelines as well as the medical complexity of this patient population. We conducted an exploratory review of relevant literature to provide an up-to-date review for internists and hepatologists caring for this patient population. We reviewed the epidemiological and pathophysiological associations between DM and CLD, the impact of insulin resistance on the progression and manifestations of CLD, the pathogenesis of hepatogenic diabetes, as well as the practical challenges in diagnosis and monitoring of DM in this patient population. We also reviewed the latest clinical evidence on various pharmacological antihyperglycemic therapies with an emphasis on liver disease-related clinical outcomes. Finally, we proposed an algorithm for managing DM in patients with CLD and discussed the clinical and research questions that remain to be addressed. 相似文献
32.
33.
34.
目的调查呼吸专科护士慢性呼吸疾病管理现状,为提高慢性呼吸疾病的管理水平提供参考。方法依据《中国成人慢性呼吸疾病患者护理管理指南》设计调查问卷,对重庆、四川、贵州、陕西、河北、湖北、海南7省市的205名呼吸专科护士进行问卷调查。结果呼吸专科护士慢性呼吸疾病管理总分为(140.72±23.90)分。慢性呼吸疾病管理得分最低的3个条目有评估工具应用、个性化管理计划的实施、慢阻肺随访的次数及指导哮喘患者使用峰流速仪;呼吸专科护士所在单位慢性呼吸疾病管理平台建设均低于50%。结论呼吸专科护士慢性呼吸疾病管理处于中等偏下水平,评估是慢性呼吸疾病管理的薄弱点。需加强呼吸专科护士专业能力培养,规范慢性呼吸疾病全程管理,强化医院平台建设等,提高慢性呼吸疾病的管理水平。 相似文献
35.
36.
37.
38.
目的:探讨肛肠疾病手术前后肛管直肠压力测定的应用。方法:将2018年5月-2019年5月在上海市松江区方塔中医医院及上海中医药大学附属曙光医院肛肠科行手术治疗的826例肛肠疾病患者作为研究对象,其中,选择性痔上黏膜吻合术246例、单纯外剥内扎术115例、外剥内扎结合内痔套扎术(Automatic Ligation of Hemorrhoids,RPH)153例、低位肛瘘切除术177例、高位肛瘘切开挂线术135例,分别于术前及术后1个月测定肛管直肠压力。结果:选择性痔上黏膜吻合术后直肠静息压、肛管静息压明显低于术前,肛管舒张压高于术前(P<0.05),但肛管最大收缩压与术前相比无明显差异(P>0.05);单纯外剥内扎术术后直肠静息压、肛管静息压明显低于术前,肛管舒张压、肛管最大收缩压明显高于术前(P<0.05);外剥内扎结合内痔套扎术术后直肠静息压、肛管静息压明显低于术前,肛管舒张压、肛管最大收缩压明显高于术前(P<0.05);低位肛瘘切除术术后直肠静息压、肛管静息压、肛管舒张压均高于术前(P<0.05),而肛管最大收缩压与术前相比无明显差异(P>0.05);高位肛瘘切开挂线术术后直肠静息压高于术前,肛管静息压、肛管舒张压低于术前(P<0.05),而与肛管最大收缩压术前相比无明显差异(P>0.05)。结论:肛肠疾病手术前后肛管直肠压力测定的应用效果显著,能准确判断手术效果及患者恢复情况,为医师的进一步诊治奠定了良好基础。 相似文献
39.
Owen Ngalamika Gongping Liang Ming Zhao Xinhai Yu Yang Yang Heng Yin 《Immunological investigations》2015,44(2):126-136
Immune dysregulation is a cardinal feature of autoimmune diseases and chronic microbial infections. In particular, regulatory T cells are downregulated in autoimmune diseases while upregulated in chronic microbial infections. FOXP3 is the master regulator of Treg development. Treg-specific demethylated region (TSDR) is a highly conserved locus on the FOXP3 gene that is fully demethylated in natural Tregs but methylated in effector T cells. In our study, we used high resolution melt-polymerase chain reaction (HRM-PCR) to determine the FOXP3 TSDR methylation status in autoimmune diseases and chronic microbial infections. We found that FOXP3 TSDR to have the highest mean melting temperature (highly methylated) in active SLE patients compared to all the other groups (p?<?0.001). The psoriasis group also had a significantly high mean melting temperature (78.62?±?0.20) when compared with the inactive SLE group (78.49?±?0.29, p?<?0.05) and control group (78.44?±?0.25, p?<?0.01). There was no significant difference in melting temperature between inactive SLE and healthy controls. Disease activity in SLE was directly associated with methylation of the FOXP3 TSDR. On the other hand, patients with chronic microbial infections had significantly lower FOXP3 TSDR mean melting temperature (demethylated) when compared with healthy controls (78.28?±?0.21 vs 78.44?±?0.25, p?<?0.05). Our results suggest that the use of HRM-PCR to detect FOXP3 TSDR methylation status is a reliable and easy method to predict natural regulatory T cell levels in peripheral blood in different disease conditions. Determining FOXP3 TSDR methylation status can be a useful tool in diagnosis, and monitoring the severity of autoimmune diseases and chronic microbial infections. 相似文献
40.
Timothee Dub Bolette Sborg Peter Henrik Andersen Thorolfur Gudnason Hanne Nkleby Ann Lindstrand Rose-Marie Carlsson Hanna Nohynek 《Euro surveillance : bulletin européen sur les maladies transmissibles = European communicable disease bulletin》2021,26(4)
Healthcare workers (HCWs) are at increased risk of both exposure and transmission of infectious disease. Two European Union (EU) directives state that health services are responsible for assessing their employees’ potential exposure to infectious diseases and offering immunisation free of charge. We assessed current policy for immunisation of HCWs and the availability of vaccine coverage data in the Nordic countries by surveying national vaccination experts in Denmark, Finland, Iceland, Norway and Sweden, as well as Swedish county medical officers (CMOs). All national experts and 17 of 21 Swedish CMOs responded. All EU countries had transposed the European directives into national law, while Norway and Iceland had similar national legislation. Recommendations or guidelines were issued in Denmark, Finland, Iceland, Norway and 15 of 17 responding Swedish counties. The range of diseases covered differed by countries and Swedish counties. HCW vaccine coverage data were not systematically collected; incomplete estimates were only available for Finland and two Swedish counties. In conclusion, recommendations or guidelines exist in the Nordic countries, but their impact cannot be assessed, as vaccine uptake among HCWs is not currently measured. Systematic collection of data is a necessary step towards improving HCW immunisation policy and practice in the Nordic countries. 相似文献