全文获取类型
收费全文 | 26982篇 |
免费 | 1812篇 |
国内免费 | 75篇 |
专业分类
耳鼻咽喉 | 186篇 |
儿科学 | 901篇 |
妇产科学 | 690篇 |
基础医学 | 3943篇 |
口腔科学 | 526篇 |
临床医学 | 3831篇 |
内科学 | 5087篇 |
皮肤病学 | 442篇 |
神经病学 | 2914篇 |
特种医学 | 640篇 |
外科学 | 2247篇 |
综合类 | 198篇 |
一般理论 | 27篇 |
预防医学 | 3004篇 |
眼科学 | 450篇 |
药学 | 1934篇 |
1篇 | |
中国医学 | 57篇 |
肿瘤学 | 1791篇 |
出版年
2023年 | 199篇 |
2022年 | 133篇 |
2021年 | 597篇 |
2020年 | 487篇 |
2019年 | 665篇 |
2018年 | 805篇 |
2017年 | 574篇 |
2016年 | 632篇 |
2015年 | 824篇 |
2014年 | 938篇 |
2013年 | 1514篇 |
2012年 | 2113篇 |
2011年 | 2250篇 |
2010年 | 1185篇 |
2009年 | 1101篇 |
2008年 | 1825篇 |
2007年 | 1895篇 |
2006年 | 1849篇 |
2005年 | 1721篇 |
2004年 | 1645篇 |
2003年 | 1507篇 |
2002年 | 1314篇 |
2001年 | 206篇 |
2000年 | 181篇 |
1999年 | 196篇 |
1998年 | 182篇 |
1997年 | 154篇 |
1996年 | 145篇 |
1995年 | 134篇 |
1994年 | 131篇 |
1993年 | 114篇 |
1992年 | 128篇 |
1991年 | 137篇 |
1990年 | 115篇 |
1989年 | 111篇 |
1988年 | 80篇 |
1987年 | 92篇 |
1986年 | 87篇 |
1985年 | 83篇 |
1984年 | 89篇 |
1983年 | 88篇 |
1982年 | 84篇 |
1981年 | 56篇 |
1980年 | 67篇 |
1979年 | 60篇 |
1978年 | 39篇 |
1977年 | 43篇 |
1976年 | 37篇 |
1975年 | 38篇 |
1974年 | 51篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Sandra Strainiene Milda Peciulyte Tomas Strainys Ieva Stundiene Ilona Savlan Valentina Liakina Jonas Valantinas 《World journal of gastroenterology : WJG》2021,27(32):5297-5305
Approximately 20% of cirrhotic patients with ascites develop umbilical herniation. These patients usually suffer from multisystemic complications of cirrhosis, have a significantly higher risk of infection, and require accurate surveillance– especially in the context of the coronavirus disease 2019 pandemic. The rupture of an umbilical hernia, is an uncommon, life-threatening complication of large-volume ascites and end-stage liver disease resulting in spontaneous paracentesis, also known as Flood syndrome. Flood syndrome remains a challenging condition for clinicians, as recommendations for its management are lacking, and the available evidence for the best treatment approach remains controversial. In this paper, four key questions are addressed regarding the management and prevention of Flood syndrome: (1) Which is the best treatment approach–conservative treatment or urgent surgery? (2) How can we establish the individual risk for herniation and possible hernia rupture in cirrhotic patients? (3) How can we prevent umbilical hernia ruptures? And (4) How can we manage these patients in the conditions created by the coronavirus disease 2019 pandemic? 相似文献
5.
Sandra Pérez Andrea Masegoso Nazaret Hernández-Espeso 《Clinical psychology & psychotherapy》2021,28(3):606-614
Due to the COVID-19 pandemic's consequences and the state of alarm, literature has shown that people worldwide have experienced severe stressors that have been associated with increased prevalence of emotional distress. In this study, we explored psychological distress (depression, anxiety, and somatization symptoms) using an online survey platform in a sample of 1,781 Spanish adults during the confinement due to COVID-19, relationships between distress and sleep problems, affect, pain, sleep, emotional regulation, gender, type of housing, history of psychopathology, and living alone during the confinement, and differences depending on demographic and psychological variables. Results showed that between 25% and 39% of the sample referred to clinically significant levels of distress. In addition, women showed higher levels of distress, negative affect, perception of pain, and cognitive reappraisal and lower levels of emotional suppression and sleep quality than men. A history of psychopathology, being younger, living alone or in a flat was associated with higher distress. Finally, the variables most strongly related to distress were negative and positive affect, levels of pain, sleep quality, and emotional suppression. Our results highlight the important role of emotional suppression, cognitive reappraisal, and loneliness and the impact of being a woman and younger in Spain during the COVID-19 pandemic. Therefore, it would be necessary to provide assessments of distress levels in these population groups and focus psychological preventive and therapeutic online interventions on expressing emotions and preventing loneliness. 相似文献
6.
Johnson Courtney A. Tran Dan N. Mwangi Ann Sosa-Rub Sandra G. Chivardi Carlos Romero-Martnez Martn Pastakia Sonak Robinson Elisha Jennings Mayo-Wilson Larissa Galrraga Omar 《Health services & outcomes research methodology》2022,22(3):297-316
Health Services and Outcomes Research Methodology - To slow the spread of COVID-19, most countries implemented stay-at-home orders, social distancing, and other nonpharmaceutical mitigation... 相似文献
7.
Robinson Sandra M. Scott Jason Ryan Sarah Adams Nicola Hassell Andrew Walker David 《Clinical rheumatology》2022,41(12):3869-3877
Clinical Rheumatology - Educating patients about methotrexate is a core role of rheumatology nurses. We have previously reported the scoring of videoed interviews of rheumatology nurses educating... 相似文献
8.
Joshua P. Entrop Caroline E. Weibull Karin E. Smedby Lasse H. Jakobsen Andreas K. Øvlisen Daniel Molin Ingrid Glimelius Anna Marklund Harald Holte Alexander Fosså Knut B. Smeland Tarec C. El-Galaly Sandra Eloranta 《International journal of cancer. Journal international du cancer》2023,153(4):723-731
Childbirth rates in classical Hodgkin lymphoma (cHL) survivors have historically been reduced compared to the general population. Understanding if contemporary treatment protocols are associated with reduced fertility is crucial as treatment guidelines shift toward more liberal use of intensive chemotherapy. We identified 2834 individuals aged 18-40 years with cHL in Swedish and Danish lymphoma registers, and in the clinical database at Oslo University Hospital diagnosed 1995-2018, who were linked to national medical birth registers. Cox regression adjusted for stage, performance status, year, and age at diagnosis was used to estimate hazard ratios (HRs) and 95% confidence intervals (CI) contrasting time to first childbirth by treatment groups (ABVD, 2-4 BEACOPP, 6-8 BEACOPP) up to 10 years after diagnosis. Overall, 74.8% of patients were treated with ABVD, 3.1% with 2-4 BEACOPP and 11.2% with 6-8 BEACOPP. Adjusted HRs comparing childbirth rates in individuals treated with 6-8 BEACOPP, and 2-4 BEACOPP to ABVD were 0.53 (CI: 0.36-0.77) and 0.33 (CI: 0.12-0.91) for males, and 0.91 (CI: 0.61-1.34) and 0.38 (CI: 0.12-1.21) for females. Cumulative incidence of childbirths after 10 years was 19.8% (CI: 14.5%-27.0%) for males and 34.3% (CI: 25.8%-45.6%) for females treated with 6-8 BEACOPP. Proportions of children born after assisted reproductive technique (ART) treatments were 77.4% (CI: 60.2-88.6%) for males following 6-8 BEACOPP, and <11% for females. Among ABVD treated patients the corresponding proportions were 12.2% (CI: 8.5%-17.3%) and 10.6% (CI: 7.4%-14.9%). BEACOPP treatment is associated with decreased childbirth rates compared to ABVD in male, but not female, cHL patients, despite widespread access to ART in the Nordics. 相似文献
9.
10.
Adriana L. Carvalho Bianca Massaro Luciana T. P. e Silva Carlos E.G. Salmon Sandra Y. Fukada Marcello H. Nogueira-Barbosa Jorge Elias Maria C.F. Freitas Carlos E.B. Couri Maria C. Oliveira Belinda P. Simões Clifford J. Rosen Francisco J.A. de Paula 《Journal of clinical densitometry》2019,22(3):420-428
Anthropomorphic measures among type 1 diabetic patients are changing as the obesity epidemic continues. Excess fat mass may impact bone density and ultimately fracture risk. We studied the interaction between bone and adipose tissue in type 1 diabetes subjects submitted to two different clinical managements: (I) conventional insulin therapy or (II) autologous nonmyeloablative hematopoietic stem-cell transplantation (AHST). The study comprised 3 groups matched by age, gender, height and weight: control (C = 24), type 1 diabetes (T1D = 23) and type 1 diabetes treated with AHST (T1D-AHST = 9). Bone mineral density (BMD) and trabecular bone score (TBS) were assessed by dual X-ray absorptiometry (DXA). 1H Magnetic resonance spectroscopy was used to assess bone marrow adipose tissue (BMAT) in the L3 vertebra, and abdominal magnetic resonance imaging was used to assess intrahepatic lipids (IHL), visceral (VAT) and subcutaneous adipose tissue (SAT). Individuals conventionally treated for T1D were more likely to be overweight (C = 23.8 ± 3.7; T1D = 25.3 ± 3.4; T1D-AHST = 22.5 ± 2.2 Kg/m2; p > 0.05), but there was no excessive lipid accumulation in VAT or liver. Areal BMD of the three groups were similar at all sites; lumbar spine TBS (L3) was lower in type 1 diabetes (p < 0.05). Neither SAT nor VAT had any association with bone parameters. Bone marrow adipose tissue (BMAT) lipid profiles were similar among groups. BMAT saturated lipids were associated with cholesterol, whereas unsaturated lipids had an association with IGF1. Overweight and normal weight subjects with type 1 diabetes have normal areal bone density, but lower trabecular bone scores. Adipose distribution is normal and BMAT volume is similar to controls, irrespective of clinical treatment. 相似文献