全文获取类型
收费全文 | 24133篇 |
免费 | 1506篇 |
国内免费 | 132篇 |
专业分类
耳鼻咽喉 | 249篇 |
儿科学 | 669篇 |
妇产科学 | 510篇 |
基础医学 | 3698篇 |
口腔科学 | 1039篇 |
临床医学 | 2156篇 |
内科学 | 5530篇 |
皮肤病学 | 669篇 |
神经病学 | 2144篇 |
特种医学 | 559篇 |
外科学 | 2206篇 |
综合类 | 50篇 |
一般理论 | 10篇 |
预防医学 | 2240篇 |
眼科学 | 475篇 |
药学 | 1654篇 |
中国医学 | 112篇 |
肿瘤学 | 1801篇 |
出版年
2024年 | 26篇 |
2023年 | 232篇 |
2022年 | 258篇 |
2021年 | 1022篇 |
2020年 | 612篇 |
2019年 | 818篇 |
2018年 | 929篇 |
2017年 | 646篇 |
2016年 | 769篇 |
2015年 | 837篇 |
2014年 | 1113篇 |
2013年 | 1411篇 |
2012年 | 2193篇 |
2011年 | 2293篇 |
2010年 | 1202篇 |
2009年 | 987篇 |
2008年 | 1689篇 |
2007年 | 1629篇 |
2006年 | 1486篇 |
2005年 | 1379篇 |
2004年 | 1197篇 |
2003年 | 1008篇 |
2002年 | 889篇 |
2001年 | 101篇 |
2000年 | 72篇 |
1999年 | 96篇 |
1998年 | 126篇 |
1997年 | 107篇 |
1996年 | 87篇 |
1995年 | 67篇 |
1994年 | 59篇 |
1993年 | 58篇 |
1992年 | 52篇 |
1991年 | 39篇 |
1990年 | 30篇 |
1989年 | 31篇 |
1988年 | 24篇 |
1987年 | 17篇 |
1986年 | 30篇 |
1985年 | 18篇 |
1984年 | 28篇 |
1983年 | 15篇 |
1982年 | 18篇 |
1981年 | 10篇 |
1980年 | 5篇 |
1979年 | 10篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1970年 | 4篇 |
1969年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
11.
Paula Cristina Galati Paula Garcia Chiarello Belinda Pinto Simões 《Nutrition and cancer》2016,68(1):86-93
Changes in resting energy expenditure (REE) of cancer patients vary depending on type of tumor, treatment time point and kind of treatment. Little is known about REE of acute leukemia adult patients after treatment, especially with results related to body weight or fat free mass (FFM). This study aimed to assess changes in REE of acute leukemia adult patients before and after the first remission induction. Evaluation of REE was performed by indirect calorimetry and predicted REE was calculated by Harris-Benedict equation. Weight and height were measured and compared to a control group of healthy individuals. FFM was assessed by bioelectrical impedance for adjusting REE values. We evaluated 18 patients and 26 healthy individuals. At diagnosis, patients presented REE, REE/weight, and REE/FFM higher than the controls. Reductions of REE, REE/weight, and REE/FFM were also observed in patients after the first cycle of chemotherapy. The predicted REE for the patients group showed significant lower value compared with measured REE. Before the first cycle of chemotherapy REE was increased but undergoes a reduction after treatment, reaching values similar to the controls. For predictive Harris-Benedict equation, stress factors should be added to avoid underestimation of REE before and after chemotherapy. 相似文献
12.
Rocco Spagnuolo Alessandro Corea Mariantonietta Blumetti Alessia Giovinazzo Massimiliano Serafino Caterina Pagliuso Raffaele Pagnotta Grazia Curto Cristina Cosco Vincenzo Cosco Rosellina Margherita Mancina Pietro Garieri Anna Papaleo Laura Grande Anna Barilaro Eugenio Garofalo Andrea Bruni Patrizia Doldo 《Journal of advanced nursing》2020,76(11):2993-3002
13.
14.
15.
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
16.
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
17.
Access to good-quality health services is crucial for the improvement of many health outcomes, such as those targeted by the
Millennium Development Goals (MDGs) adopted by the international community in 2000. The health-related MDGs cannot be achieved
if vulnerable populations do not have access to skilled personnel and to other necessary inputs. This paper focuses on the
geographical dimension of access and on one of its critical determinants: the availability of qualified personnel. The objective
of this paper is to offer a better understanding of the determinants of geographical imbalances in the distribution of health
personnel, and to identify and assess the strategies developed to correct them. It reviews the recent literature on determinants,
barriers and the effects of strategies that attempted to correct geographical imbalances, with a focus on empirical studies
from developing and developed countries. An analysis of determinants of success and failures of strategies implemented, and
a summary of lessons learnt, is included. 相似文献
18.
Luis Gajate Ascensión Martín Elena Elías Maria T Tenorio Angélica de Pablo Cristina Carrasco Adolfo Martínez Angel Candela Javier Zamora Fernando Lia?o 《Liver transplantation》2006,12(9):1371-1380
Although renal dysfunction is common after liver transplantation, postoperative renal function after split liver transplantation (SLT) has not been well studied. Renal function immediately after surgery was analyzed retrospectively in 16 patients that received a SLT (SLT group). The results were compared with corresponding data from 31 matched patients that received a full-size liver transplant (FSLT group) during the same period. Serum creatinine (SCr) was measured before surgery, and, after transplantation, daily during the first week and at days 14, 21, and 28. Renal dysfunction (RD) was defined as the requirement for renal replacement therapy (RRT) or a 100% increase in SCr if the basal value had been <1.0 mg/dL or a 50% increase in SCr if the basal value had been >1.0 mg/dL. SCr had to be at least 1.5 mg/dL for a diagnosis of RD to be considered. The classification of RD was: mild, SCr 1.5-2.4 mg/dL; moderate, SCr 2.5-4.0 mg/dL; or severe, SCr >4.0 mg/dL (the requirement for RRT). Both donor and recipient age and cold ischemia time were lower in the SLT group than in the FSLT group (P < 0.05). Length of surgery was longer in the SLT group (P < 0.05). There were no significant differences between groups with respect to Model for End-Stage Liver Disease scores, the need for transfusions, the length of admission to the intensive care unit (ICU), survival rate, individual severity index, or sepsis-related organ failure assessment scores at the time of diagnosing RD. Immunosuppression regimens were similar in both groups. RD developed in 82% of SLT patients, but in only 58% of FSLT patients (P = not significant [NS]). Among SLT patients, RD (23.0% mild, 15.5% moderate, and 61.5% severe) was more severe (P = 0.007) than in FSLT patients (63.1% mild, 15.8% moderate, and 24.1% severe). The requirement for RRT in the SLT group (43.7%) was significantly greater (P < 0.05) than that in the FSLT group (12.9%). This finding may be due to the different incidence of sepsis in the 2 groups (SLT 37.5% vs. FSLT 9.7%; P < 0.05). In conclusion, although the number of patients studied was small, our data suggest a higher incidence of RD and a greater requirement for RRT in patients that receive a split liver graft than in those that receive a full size liver graft. 相似文献
19.
20.