全文获取类型
收费全文 | 394282篇 |
免费 | 21694篇 |
国内免费 | 14254篇 |
专业分类
耳鼻咽喉 | 3212篇 |
儿科学 | 9006篇 |
妇产科学 | 5792篇 |
基础医学 | 41419篇 |
口腔科学 | 5312篇 |
临床医学 | 41344篇 |
内科学 | 61522篇 |
皮肤病学 | 3311篇 |
神经病学 | 27167篇 |
特种医学 | 16754篇 |
外国民族医学 | 110篇 |
外科学 | 50194篇 |
综合类 | 41239篇 |
现状与发展 | 46篇 |
一般理论 | 23篇 |
预防医学 | 33751篇 |
眼科学 | 8535篇 |
药学 | 33734篇 |
238篇 | |
中国医学 | 13947篇 |
肿瘤学 | 33574篇 |
出版年
2024年 | 707篇 |
2023年 | 3221篇 |
2022年 | 8681篇 |
2021年 | 10982篇 |
2020年 | 8426篇 |
2019年 | 7160篇 |
2018年 | 28781篇 |
2017年 | 24083篇 |
2016年 | 25604篇 |
2015年 | 11225篇 |
2014年 | 13587篇 |
2013年 | 12946篇 |
2012年 | 24505篇 |
2011年 | 39911篇 |
2010年 | 31369篇 |
2009年 | 21470篇 |
2008年 | 32362篇 |
2007年 | 33728篇 |
2006年 | 12352篇 |
2005年 | 13203篇 |
2004年 | 10721篇 |
2003年 | 10993篇 |
2002年 | 8007篇 |
2001年 | 4882篇 |
2000年 | 4979篇 |
1999年 | 4577篇 |
1998年 | 2839篇 |
1997年 | 2885篇 |
1996年 | 2133篇 |
1995年 | 2054篇 |
1994年 | 1829篇 |
1993年 | 1074篇 |
1992年 | 1429篇 |
1991年 | 1293篇 |
1990年 | 1069篇 |
1989年 | 961篇 |
1988年 | 861篇 |
1987年 | 676篇 |
1986年 | 498篇 |
1985年 | 450篇 |
1984年 | 227篇 |
1983年 | 188篇 |
1982年 | 121篇 |
1981年 | 125篇 |
1980年 | 121篇 |
1979年 | 112篇 |
1978年 | 63篇 |
1974年 | 68篇 |
1938年 | 60篇 |
1932年 | 57篇 |
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
51.
52.
目的探讨不同介入模式在肝癌治疗中的应用分析。方法选取我院肝癌患者130例,将其分为三组,其中,一组患者采用经肝动脉化疗栓塞术(TACE)治疗,二组患者采用肝门静脉化疗栓塞术(PVCE)治疗,三组患者在前两组患者治疗的基础上进行经皮肝穿刺乙醇消融(PEI)治疗,对比分析三组患者的治疗效果。结果一组治疗总有效率为27.5%,二组治疗总有效率为35%,三组治疗总有效率为92%,三组相对于一、二组来说治疗效果更佳,差异具有统计学意义(P0.05)。结论肝动脉化疗栓塞术、肝门静脉化疗栓塞术和经皮肝穿刺乙醇消融治疗相结合治疗肝癌患者,能够有效提高患者治疗效果,稳定患者病情。 相似文献
53.
Assessment of Myocardial Infarct Size by Three‐Dimensional and Two‐Dimensional Speckle Tracking Echocardiography: A Comparative Study to Single Photon Emission Computed Tomography 下载免费PDF全文
54.
Chih-Wei Hsu Sheng-Yu Lee Yao-Hsu Yang Liang-Jen Wang 《The international journal of neuropsychopharmacology / official scientific journal of the Collegium Internationale Neuropsychopharmacologicum (CINP)》2020,23(10):653
BackgroundGeneric antidepressants are approved on the market based on evidence of bioequivalence to their brand-name versions. We aimed to assess whether generic antidepressants exert equal effectiveness as their brand-name counterparts for treating patients with depressive disorders.MethodsIn a nationwide, population-based cohort in Taiwan from 1997 through 2013, patients with a diagnosis of a depressive disorder aged between 18 and 65 years who were new users of antidepressant drugs were classified into either the brand-name group or the generic group. All patients were followed up until medication discontinuation or the end of the study period. We assessed the risk for hospitalization as a primary outcome and augmentation therapy, daily dose, medication discontinuation, or switching to another antidepressant as secondary outcomes.ResultsA total of 277 651 brand-name users (35.8% male; mean age: 41.2 years) and 270 583 generic users (35.8% male; mean age: 41.0 years) were divided into 10 different antidepressant groups (fluoxetine, sertraline, paroxetine, escitalopram, citalopram, venlafaxine, mirtazapine, moclobemide, imipramine, and bupropion). We found that patients treated with the generic form of sertraline, paroxetine, escitalopram, venlafaxine, mirtazapine, and bupropion demonstrated significantly higher risks of psychiatric hospitalization (adjusted hazard ratios ranged from 1.20–2.34), compared to their brand-name counterparts. The differences between brand-name antidepressants and their generic counterparts in secondary outcomes varied across different drugs.ConclusionsCompared to most generic antidepressants, brand-name drugs exhibited more protective effects on psychiatric hospitalization for depressive patients. These findings could serve as an important reference for clinicians when encountering patients with depressive disorder. 相似文献
55.
赵阳 《中国继续医学教育》2020,(4):142-144
目的分析米非司酮和宫瘤消胶囊的联合应用对子宫肌瘤的临床治疗效果。方法本研究对象为80例子宫肌瘤患者,收治时间均在2017年3月—2018年3月期间。将上述子宫肌瘤患者随机分成两组,各40例。给予对照组患者口服米非司酮进行治疗,研究组患者在上述治疗的基础上增加宫瘤消胶囊口服治疗,记录2组患者治疗效果,性激素水平及子宫体积及肿瘤体积变化。结果(1)研究组患者的总体有效率显著高于对照组;(2)研究组患者的P、E2、LH及FSH均显著低于对照组;(3)研究组患者子宫体积及肿瘤体积均显著低于对照组。结论米非司酮片和宫瘤消胶囊的联合治疗对子宫肌瘤患者的治疗效果较显著。 相似文献
56.
57.
N. S. Hari Narayana Moorthy Sergio F. Sousa Maria J. Ramos Pedro A. Fernandes 《Medicinal chemistry research》2016,25(7):1340-1357
Farnesyltransferase (FTase) is one of the prenyltransferase family enzymes that catalyse the transfer of 15-membered isoprenoid (farnesyl) moiety to the cysteine of CAAX motif-containing proteins including Rho and Ras family of G proteins. Inhibitors of FTase act as drugs for cancer, malaria, progeria and other diseases. In the present investigation, we have developed two structure-based pharmacophore models from protein–ligand complex (3E33 and 3E37) obtained from the protein data bank. Molecular dynamics (MD) simulations were performed on the complexes, and different conformers of the same complex were generated. These conformers were undergone protein–ligand interaction fingerprint (PLIF) analysis, and the fingerprint bits have been used for structure-based pharmacophore model development. The PLIF results showed that Lys164, Tyr166, TrpB106 and TyrB361 are the major interacting residues in both the complexes. The RMSD and RMSF analyses on the MD-simulated systems showed that the absence of FPP in the complex 3E37 has significant effect in the conformational changes of the ligands. During this conformational change, some interactions between the protein and the ligands are lost, but regained after some simulations (after 2 ns). The structure-based pharmacophore models showed that the hydrophobic and acceptor contours are predominantly present in the models. The pharmacophore models were validated using reference compounds, which significantly identified as HITs with smaller RMSD values. The developed structure-based pharmacophore models are significant, and the methodology used in this study is novel from the existing methods (the original X-ray crystallographic coordination of the ligands is used for the model building). In our study, along with the original coordination of the ligand, different conformers of the same complex (protein–ligand) are used. It concluded that the developed methodology is significant for the virtual screening of novel molecules on different targets. 相似文献
58.
59.
To evaluate the anthropometric indexes in subjects with varicocele compared to controls and the incidence of varicocele in different body mass index (BMI) groups for the purpose of exploring the association between varicocele and anthropometric indexes. A comprehensive literature search was conducted by using PubMed, MEDLINE, EMBASE databases and Cochrane Library up to February 2019. A systematic review and meta‐analysis was conducted by STATA, and Newcastle–Ottawa Scale was utilised for assessing risk of bias. Ultimately, 13 articles containing seven case–control studies and six cross‐sectional studies with 1,385,630 subjects were involved in our study. Pooled results demonstrated that varicocele patients had a lower BMI (WMD = ?0.77, 95% CI = ?1.03 to ?0.51) and a higher height than nonvaricocele participants, especially in grade 3 varicocele patients. Subgroup analyses showed that normal BMI individuals had a higher risk of varicocele than obese or overweight individuals and a lower risk than underweight individuals. In conclusion, this study indicates that varicocele patients have a lower BMI and a higher height than nonvaricocele participants. Moreover, men with excess bodyweight have a lower incidence of varicocele compared to normal weight or underweight people. That is to say, high BMI and adiposity protect against varicocele and high BMI is associated with a decreased risk of varicocele. 相似文献
60.
Valerie Iles 《Health care analysis》2016,24(2):105-118
This paper takes a somewhat slant perspective on flourishing and care in the context of suffering, death and dying, arguing that care in this context consists principally of ‘acts of work and courage that enable flourishing’. Starting with the perception that individuals, society and health care professionals have become dulled to death and the process of dying in Western advanced health systems, it suggests that for flourishing to occur, both of these aspects of life need to be faced more directly. The last days of life need to be ‘undulled’. Reflections upon the experiences of the author as carer and daughter in the face of her mother’s experience of death are used as basis for making suggestions about how care systems and professionals might better assist people in dealing with ‘the most grown up thing’ humans ever do, which is to die. 相似文献