全文获取类型
收费全文 | 38757篇 |
免费 | 2429篇 |
国内免费 | 179篇 |
专业分类
耳鼻咽喉 | 406篇 |
儿科学 | 882篇 |
妇产科学 | 987篇 |
基础医学 | 5929篇 |
口腔科学 | 2549篇 |
临床医学 | 3153篇 |
内科学 | 8411篇 |
皮肤病学 | 1167篇 |
神经病学 | 3372篇 |
特种医学 | 680篇 |
外科学 | 3156篇 |
综合类 | 154篇 |
一般理论 | 21篇 |
预防医学 | 4415篇 |
眼科学 | 594篇 |
药学 | 3088篇 |
中国医学 | 250篇 |
肿瘤学 | 2151篇 |
出版年
2024年 | 49篇 |
2023年 | 441篇 |
2022年 | 1002篇 |
2021年 | 1759篇 |
2020年 | 1014篇 |
2019年 | 1449篇 |
2018年 | 1774篇 |
2017年 | 1187篇 |
2016年 | 1150篇 |
2015年 | 1413篇 |
2014年 | 1888篇 |
2013年 | 2297篇 |
2012年 | 3480篇 |
2011年 | 3703篇 |
2010年 | 1847篇 |
2009年 | 1535篇 |
2008年 | 2544篇 |
2007年 | 2536篇 |
2006年 | 2146篇 |
2005年 | 1950篇 |
2004年 | 1689篇 |
2003年 | 1430篇 |
2002年 | 1208篇 |
2001年 | 226篇 |
2000年 | 189篇 |
1999年 | 206篇 |
1998年 | 182篇 |
1997年 | 162篇 |
1996年 | 103篇 |
1995年 | 86篇 |
1994年 | 83篇 |
1993年 | 63篇 |
1992年 | 97篇 |
1991年 | 66篇 |
1990年 | 61篇 |
1989年 | 43篇 |
1988年 | 40篇 |
1987年 | 23篇 |
1986年 | 23篇 |
1985年 | 25篇 |
1984年 | 19篇 |
1983年 | 15篇 |
1982年 | 23篇 |
1981年 | 14篇 |
1980年 | 17篇 |
1979年 | 15篇 |
1976年 | 8篇 |
1975年 | 10篇 |
1974年 | 9篇 |
1973年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
María Cabrerizo Gloria Trallero María José Pena Amaia Cilla Gregoria Megias Carmen Mu?oz-Almagro Eva Del Amo Diana Roda Ana Isabel Mensalvas Antonio Moreno-Docón Juan García-Costa Nuria Rabella Manuel Ome?aca María Pilar Romero Sara Sanbonmatsu-Gámez Mercedes Pérez-Ruiz María José Santos-Mu?oz Cristina Calvo And the study group of “Enterovirus parechovirus infections in children under ?years-old Spain” PI- 《European journal of pediatrics》2015,174(11):1511-1516
32.
33.
34.
Darren R. Feldman MD Yasser Ged MBBS Chung-Han Lee PhD Andrea Knezevic MS Ana M. Molina MD Ying-Bei Chen PhD Joshua Chaim DO Devyn T. Coskey MS Samuel Murray MS Satish K. Tickoo MD Victor E. Reuter MD Sujata Patil PhD Han Xiao MD Jahan Aghalar MD Arlyn J. Apollo MD Maria I. Carlo MD Robert J. Motzer MD Martin H. Voss MD 《Cancer》2020,126(24):5247-5255
35.
36.
Luis J García-Flórez Guillermo Gómez-álvarez Ana M Frunza Luis Barneo-Serra Manuel F Fresno-Forcelledo 《World journal of gastrointestinal surgery》2015,7(9):196-202
AIM: To establish the association between lymph node involvement and the response to neoadjuvant therapy in locally advanced rectal cancer.METHODS: Data of 130 patients with mid and low locally advanced rectal adenocarcinoma treated with neoadjuvant chemoradiation followed by radical surgery over a 5-year period were reviewed. Tumor staging was done by endorectal ultrasound and/or magnetic resonance imaging. Tumor response to neoadjuvant therapy was determined by T-downstaging and tumor regression grading (TRG). Pathologic complete response (pCR) is defined as the absence of tumor cells in the surgical specimen (ypT0N0). The varying degrees TRG were classified according to Mandard’s scoring system. The evaluation of the response is based on the comparison between previous clinico-radiological staging and the results of pathological evaluation. χ2 and Spearman’s correlation tests were used for the comparison of variables.RESULTS: Pathologic complete response (pCR, ypT0N0, TRG1) was observed in 19 cases (14.6%), and other 18 (13.8%) had only very few residual malignant cells in the rectal wall (TRG2). T-downstaging was found in 63 (48.5%). Mean lymph node retrieval was 9.4 (range 0-38). In 37 cases (28.5%) more than 12 nodes were identified in the surgical specimen. Preoperative lymph node involvement was seen in 77 patients (59.2%), 71 N1 and 6 N2. Postoperative lymph node involvement was observed in 41 patients (31.5%), 29 N1 and 12 N2, while the remaining 89 were N0 (68.5%). In relation to ypT stage, we found nodal involvement of 9.4% in ypT0-1, 22.2% in ypT2 and 43.7% in ypT3-4. Of the 37 patients considered “responders” to neoadjuvant therapy (TRG1 and 2), there were only 4 N+ (10.8%) and the remainder N0 (89.2%). In the “non responders” group (TRG 3, 4 and 5), 37 cases were N+ (39.8%) and 56 (60.2%) were N0 (P < 0.001).CONCLUSION: Response to neoadjuvant chemoradiation in rectal cancer is associated with lymph node involvement. 相似文献
37.
Rubens Souza de OLIVEIRA Lanna Jamile Corrêa da COSTA Fernanda Atanaena Gon?alves de ANDRADE Wilson UIEDA Luzia Fátima Alves MARTORELLI Ana Paula de Arruda Geraldes KATAOKA Elizabeth Salbé Travassos da ROSA Pedro Fernando da Costa VASCONCELOS Armando de Souza PEREIRA Ant?nio Ismael Barros do CARMO Marcus Emanuel Barroncas FERNANDES 《Revista do Instituto de Medicina Tropical de S?o Paulo》2015,57(6):497-503
The outbreaks of rabies in humans transmitted by Desmodus rotundus in 2004 and 2005,
in the northeast of the Brazilian State of Para, eastern Amazon basin, made this a
priority area for studies on this zoonosis. Given this, the present study provides
data on this phenomenon in an urban context, in order to assess the possible
circulation of the classic rabies virus (RABV) among bat species in Capanema, a town
in the Amazon basin. Bats were collected, in 2011, with mist nets during the wet and
dry seasons. Samples of brain tissue and blood were collected for virological and
serological survey, respectively. None of the 153 brain tissue samples analyzed
tested positive for RABV infection, but 50.34% (95% CI: 45.67-55.01%) of the serum
samples analyzed were seropositive. Artibeus planirostris was the most common
species, with a high percentage of seropositive individuals (52.46%, 95% CI: 52.31
52.60%). Statistically, equal proportions of seropositive results were obtained in
the rainy and dry seasons (c2 = 0.057, d.f. = 1, p = 0.88). Significantly
higher proportions of males (55.96%, 95% CI: 48.96-62.96%) and adults (52.37%, 95%
CI: 47.35-57.39%) were seropositive. While none of the brain tissue samples tested
positive for infection, the high proportion of seropositive specimens indicates that
RABV may be widespread in this urban area. 相似文献
38.
39.
40.
Modena Débora Aparecida Oliveira Miranda Ana Carolina Godoy Grecco Clovis Liebano Richard Eloin Cordeiro Raquel Cristina Tancsik Guidi Renata Michelini 《Lasers in medical science》2020,35(4):797-806
Lasers in Medical Science - Using light sources in phototherapy has presented promising results regarding several types of facial and body skin affections for centuries. The neodymium-doped yttrium... 相似文献