全文获取类型
收费全文 | 5614篇 |
免费 | 407篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 93篇 |
儿科学 | 331篇 |
妇产科学 | 170篇 |
基础医学 | 711篇 |
口腔科学 | 53篇 |
临床医学 | 854篇 |
内科学 | 974篇 |
皮肤病学 | 123篇 |
神经病学 | 471篇 |
特种医学 | 121篇 |
外国民族医学 | 7篇 |
外科学 | 562篇 |
综合类 | 64篇 |
一般理论 | 5篇 |
预防医学 | 685篇 |
眼科学 | 82篇 |
药学 | 369篇 |
中国医学 | 13篇 |
肿瘤学 | 340篇 |
出版年
2023年 | 28篇 |
2022年 | 39篇 |
2021年 | 81篇 |
2020年 | 52篇 |
2019年 | 75篇 |
2018年 | 113篇 |
2017年 | 88篇 |
2016年 | 88篇 |
2015年 | 111篇 |
2014年 | 118篇 |
2013年 | 249篇 |
2012年 | 340篇 |
2011年 | 385篇 |
2010年 | 187篇 |
2009年 | 165篇 |
2008年 | 341篇 |
2007年 | 391篇 |
2006年 | 321篇 |
2005年 | 343篇 |
2004年 | 372篇 |
2003年 | 305篇 |
2002年 | 285篇 |
2001年 | 78篇 |
2000年 | 94篇 |
1999年 | 95篇 |
1998年 | 66篇 |
1997年 | 66篇 |
1996年 | 54篇 |
1995年 | 41篇 |
1994年 | 42篇 |
1993年 | 38篇 |
1992年 | 74篇 |
1991年 | 83篇 |
1990年 | 56篇 |
1989年 | 68篇 |
1988年 | 51篇 |
1987年 | 52篇 |
1986年 | 42篇 |
1985年 | 56篇 |
1984年 | 46篇 |
1983年 | 56篇 |
1982年 | 39篇 |
1981年 | 34篇 |
1980年 | 36篇 |
1979年 | 23篇 |
1978年 | 27篇 |
1977年 | 29篇 |
1976年 | 21篇 |
1974年 | 25篇 |
1973年 | 21篇 |
排序方式: 共有6028条查询结果,搜索用时 15 毫秒
101.
102.
Kathleen E. Langbehn Ellen van der Plas David J. Moser Jeffrey D. Long Laurie Gutmann Peggy C. Nopoulos 《Journal of neuroscience research》2021,99(1):190-199
Studies have shown relationships between white matter abnormalities and cognitive dysfunction in myotonic dystrophy type 1 (DM1), but comprehensive analysis of potential structure–function relationships are lacking. Fifty adult‐onset DM1 individuals (33 female) and 68 unaffected adults (45 female) completed the Wechsler Adult Intelligence Scale‐IV (WAIS‐IV) to determine the levels and patterns of intellectual functioning. Neuroimages were acquired with a 3T scanner and were processed with BrainsTools. Regional brain volumes (regions of interest, ROIs) were adjusted for inter‐scanner variation and intracranial volume. Linear regression models were conducted to assess if group by ROI interaction terms significantly predicted WAIS‐IV composite scores. Models were adjusted for age and sex. The DM1 group had lower Perceptual Reasoning Index (PRI), Working Memory Index (WMI), and Processing Speed Index (PSI) scores than the unaffected group (PRI t(113) = ?3.28, p = 0.0014; WMI t(114) = ?3.49, p = 0.0007; PSI t(114) = ?2.98, p = 0.0035). The group by hippocampus interaction term was significant for both PRI and PSI (PRI (t(111) = ?2.82, p = 0.0057; PSI (t(112) = ?2.87, p = 0.0049)). There was an inverse association between hippocampal volume and both PRI and PSI in the DM1 group (the higher the volume, the lower the intelligence quotient scores), but no such association was observed in the unaffected group. Enlarged hippocampal volume may underlie some aspects of cognitive dysfunction in adult‐onset DM1, suggesting that increased volume of the hippocampus may be pathological. 相似文献
103.
W.R. Wayne Martin MD Michael Miles MD Qiaonan Zhong MD Johanna Hartlein APRN Brad A. Racette MD Scott A. Norris MD Mwiza Ushe MD Baijayanta Maiti MD PhD Susan Criswell MD Albert A. Davis MD PhD Paul T. Kotzbauer MD PhD Nigel J. Cairns PhD Richard J. Perrin MD PhD Joel S. Perlmutter MD 《Movement disorders》2021,36(4):948-954
104.
105.
Bo Zhang Yan Zhou Nan Lin Rebecca F. Lowdon Chibo Hong Raman P. Nagarajan Jeffrey B. Cheng Daofeng Li Michael Stevens Hyung Joo Lee Xiaoyun Xing Jia Zhou Vasavi Sundaram GiNell Elliott Junchen Gu Taoping Shi Philippe Gascard Mahvash Sigaroudinia Thea D. Tlsty Theresa Kadlecek Arthur Weiss Henriette O’Geen Peggy J. Farnham Cécile L. Maire Keith L. Ligon Pamela A.F. Madden Angela Tam Richard Moore Martin Hirst Marco A. Marra Baoxue Zhang Joseph F. Costello Ting Wang 《Genome research》2013,23(9):1522-1540
106.
Peggy Mulongo Sue McAndrew Eunice Ayodeji 《International journal of mental health nursing》2021,30(1):235-248
Globally, the exodus of individuals who have been forced to flee their home and seek refuge in countries of safety has led to a refugee crisis. The United Kingdom (UK) has engaged with the United Nations High Commissioner for Refugees (UNHCR) in playing a significant role in the long‐term resettlement of refugees, half of whom are children and young people. One initiative of such humanitarian resettlement is the Gateway Protection Programme (GPP). To date, there is a dearth of studies investigating aspects of acculturation that affect the mental health of young refugees resettled under the UNHCR humanitarian programme. This study aimed to explore aspects of acculturation that could enhance the mental health of GPP young refugees several years after resettlement. Using narrative research, a purposive sample of 31 GPP young refugees, who had a minimum of three‐year stay in the UK, were recruited from local refugee community organizations. Data were collected through a multi‐method design combining focus group discussions (FGDs) with visual arts‐based narrative research (VABNR) and analysed thematically. Three overarching themes emerged: People and places; Its nearly all new to me; and Finding self. This study contributes important knowledge regarding the mental well‐being of young people who have engaged in a resettlement programme and offers valuable information for policymakers and mental health professionals working with GPP young refugees. 相似文献
107.
108.
Gerald Vanzetto Peggy Jacon Alex Calizzano Yannick Neuder Patrice Faure Daniel Fagret Jacques Machecourt 《Journal of nuclear cardiology》2007,14(6):835-842
BACKGROUND: The N-terminal-pro-B natriuretic peptide (Nt-pro-BNP) is of diagnostic and prognostic value in coronary artery disease (CAD). We assessed the relationship between Nt-pro-BNP and (1) the extent of ischemia on stress myocardial perfusion imaging (MPI), and (2) changes between the basal and postexercise ejection fraction (EF), in stable patients with a normal EF. METHODS AND RESULTS: One hundred and two patients with stable, documented CAD (EF, 62% +/- 8%) underwent an exercise-rest thallium-201 gated-MPI and serial Nt-pro-BNP assays. Myocardial perfusion imaging produced abnormal results in 57 patients (56%; group 1), and normal results in 45 patients (44%; group 2). Median baseline, immediate postexercise, and 3-hour postexercise Nt-pro-BNP values were higher in group 1 than in group 2: 182 vs 85, 201 vs 86, and 212 vs 99 pg/mL, respectively (P < .001 for all). Postexercise EF decreased in group 1 (53% +/- 11% vs 62% +/- 10%, P < .001), but not in group 2 (61% +/- 9% vs 62% +/- 7%, NS). The Nt-pro-BNP ruled out significant ischemia with a negative predictive value of 0.90, whereas patients within the higher tertile of Nt-pro-BNP had a fivefold higher risk of ischemia compared with patients within the lower tertile. CONCLUSIONS: The post-stress increase in Nt-pro-BNP is related to myocardial ischemia and to postischemic left-ventricular dysfunction, and accurately predicts the presence or absence of myocardial perfusion defects. 相似文献
110.