全文获取类型
收费全文 | 21585篇 |
免费 | 1365篇 |
国内免费 | 155篇 |
专业分类
耳鼻咽喉 | 170篇 |
儿科学 | 629篇 |
妇产科学 | 486篇 |
基础医学 | 3342篇 |
口腔科学 | 447篇 |
临床医学 | 1784篇 |
内科学 | 5328篇 |
皮肤病学 | 411篇 |
神经病学 | 2161篇 |
特种医学 | 635篇 |
外科学 | 1965篇 |
综合类 | 58篇 |
一般理论 | 5篇 |
预防医学 | 1599篇 |
眼科学 | 269篇 |
药学 | 1571篇 |
中国医学 | 67篇 |
肿瘤学 | 2178篇 |
出版年
2024年 | 31篇 |
2023年 | 209篇 |
2022年 | 432篇 |
2021年 | 732篇 |
2020年 | 445篇 |
2019年 | 598篇 |
2018年 | 653篇 |
2017年 | 554篇 |
2016年 | 604篇 |
2015年 | 667篇 |
2014年 | 851篇 |
2013年 | 1149篇 |
2012年 | 1812篇 |
2011年 | 1829篇 |
2010年 | 1021篇 |
2009年 | 890篇 |
2008年 | 1456篇 |
2007年 | 1395篇 |
2006年 | 1334篇 |
2005年 | 1194篇 |
2004年 | 1086篇 |
2003年 | 898篇 |
2002年 | 804篇 |
2001年 | 225篇 |
2000年 | 219篇 |
1999年 | 219篇 |
1998年 | 174篇 |
1997年 | 136篇 |
1996年 | 117篇 |
1995年 | 77篇 |
1994年 | 71篇 |
1993年 | 71篇 |
1992年 | 123篇 |
1991年 | 126篇 |
1990年 | 116篇 |
1989年 | 80篇 |
1988年 | 88篇 |
1987年 | 92篇 |
1986年 | 69篇 |
1985年 | 60篇 |
1984年 | 48篇 |
1983年 | 43篇 |
1982年 | 30篇 |
1981年 | 21篇 |
1980年 | 23篇 |
1979年 | 26篇 |
1978年 | 18篇 |
1974年 | 22篇 |
1973年 | 28篇 |
1970年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
2.
3.
4.
Alessia Scarselli Silvia Di Cesare Claudia Capponi Simona Cascioli Maria L. Romiti Gigliola Di Matteo Alessandra Simonetti Paolo Palma Andrea Finocchi Barbarella Lucarelli Rita M. Pinto Ippolita Rana Giuseppe Palumbo Maurizio Caniglia Paolo Rossi Rita Carsetti Caterina Cancrini Alessandro Aiuti 《Journal of clinical immunology》2015,35(4):373-383
5.
José Antonio Pereira Miguel Pera Manuel López-Cano Marta Pascual Sandra Alonso Silvia Salvans Marta Jiménez-Toscano Alba González-Martín Luis Grande-Posa 《Cirugía espa?ola》2019,97(1):20-26
Objectives
To determine the incidence of incisional hernia (IH) in the extraction incision (EI) in colorectal resection for cancer. To analyze whether the location of the incision has any relationship with the incidence of hernias and whether mesh could be useful for prevention in high-risk patients.Methods
Retrospective review of the colon and rectal surgery database from January 2015 to December 2016. Data were classified into 2 groups, transverse (TI) and midline incision (MI), and the latter was divided into 2 subgroups (mesh [MIM] and suture [MIS]). Patients were classified using the HERNIAscore. Hernias were diagnosed by clinical and/or CT examination.Results
A total of 182 out of 210 surgical patients were included. After a median follow-up of 13.0 months, 39 IH (21.9%) were detected, 23 of which (13.4%) were in the EI; their frequency was lower in the TI group (3.4%) and in the MIM group (5.9%) than in the MIS group (29.5%; p = 0.007). The probability of developing IH in the MIS group showed an OR = 11.7 (95%CI: 3.3-42.0) compared to the TI group and 4.3 (IC 95%: 1.1-16.3) versus the MIM group.Conclusions
The location of the incision is relevant to avoid incisional hernias. Transverse incisions should be used as the first option. When a midline incision is needed, a prophylactic mesh could be considered in high risk patients because it is safe and associated with low morbidity. 相似文献6.
7.
8.
9.
Antonio Sierra-Cedillo Miriam Figueroa-Olea Silvia Izazola-Ezquerro Rolando Rivera-González 《Early child development and care》2019,189(6):883-895
The concept of participation was reviewed as a component of children's citizenship in order to promote a programme for Integral Development. A narrative revision of the literature was carried out as well as a group discussion was organized along with the staff of an Integral Care Programme, in order to identify notions of democracy and child citizenship related to care and rearing. Some elements that favoured the child participation and some parenting skills were identified. Among the elements that must be encouraged in children are: the development of emotional, cognitive and communicative skills and promotion of decision-making; among the parent skills development included are: sensitivity and responsivity; establishing routines and participation experiences. It is important to stand out that the identified elements to promote child participation and parental competences should be adapted to every specific cultural context. 相似文献
10.
Maria Ricci Agostino Chiaravalloti Alessandro Martorana Giacomo Koch Vincenzo De lucia Gaetano Barbagallo Orazio Schillaci 《Annals of nuclear medicine》2020,34(4):254-262
The aim of our study was to investigate the impact of the epsilon phenotype in brain glucose consumption in a population with Alzheimer’s disease. Statistical Parametric Mapping (SPM8) was used to investigate differences in brain glucose consumption (as detectable by means of 18F FDG-PET/CT) in the population examined. A total of 129 patients (72 females and 57 males) with a diagnosis of probable AD according to the NINCDS-ADRDA criteria underwent the PET/CT examination. The mean (SD) age of the patients was 70 (± 7) years; the mean Mini-Mental State Examination was 19(± 5.6). 59 expressed epsilon 4 phenotype (E4) and 70 expressed the epsilon 3 phenotype (E3). Cerebral spinal fluid amyloid, tau, and t-tau have been measured resulting equal to 367.4 (± 149.1), 584.7 (± 312.1), and 79.2(± 45.9) pg/ml, respectively. Patients with confirmed amyloid and Tau changes were classified as AD. Patients with amyloid changes but negative Tau, considered as high risk of AD, were classified as IAD. Age, sex, MMSE, scholarship, and CSF parameters were used as a covariate in the SPM analyses. We did not find significant differences in age, gender, and MMSE and CSF parameters among groups. In the analysis of the AD group as compared to AD-E3, AD-E4 subjects show a significant reduction of brain glucose consumption in inferior frontal gyrus bilaterally (BA 45, BA 47). In the analysis of the IAD group as compared to IAD-E3, IAD-E4 subjects show a significant reduction of brain glucose consumption in right in medial, middle, and superior frontal gyrus (BA10, BA11), and in left medial and middle frontal gyrus (BA10, BA11). The differences between IAD-E3 and AD-E3 and between IAD-E4 and AD-E4 (and vice versa analysis) resulted not significant. APO-e4 is related to a major involvement of the frontal cortex confirming its role of risk factor in AD, while APO-3 seems not related to a specific pattern, supporting the hypothesis of neutral/protective role in AD. 相似文献