全文获取类型
收费全文 | 20314篇 |
免费 | 1418篇 |
国内免费 | 37篇 |
专业分类
耳鼻咽喉 | 123篇 |
儿科学 | 695篇 |
妇产科学 | 713篇 |
基础医学 | 2785篇 |
口腔科学 | 278篇 |
临床医学 | 3417篇 |
内科学 | 3831篇 |
皮肤病学 | 204篇 |
神经病学 | 1997篇 |
特种医学 | 319篇 |
外科学 | 1464篇 |
综合类 | 263篇 |
一般理论 | 32篇 |
预防医学 | 2830篇 |
眼科学 | 163篇 |
药学 | 1278篇 |
中国医学 | 13篇 |
肿瘤学 | 1364篇 |
出版年
2023年 | 89篇 |
2022年 | 165篇 |
2021年 | 337篇 |
2020年 | 217篇 |
2019年 | 376篇 |
2018年 | 391篇 |
2017年 | 286篇 |
2016年 | 357篇 |
2015年 | 409篇 |
2014年 | 610篇 |
2013年 | 968篇 |
2012年 | 1403篇 |
2011年 | 1404篇 |
2010年 | 778篇 |
2009年 | 757篇 |
2008年 | 1365篇 |
2007年 | 1348篇 |
2006年 | 1344篇 |
2005年 | 1382篇 |
2004年 | 1321篇 |
2003年 | 1290篇 |
2002年 | 1251篇 |
2001年 | 158篇 |
2000年 | 141篇 |
1999年 | 177篇 |
1998年 | 263篇 |
1997年 | 222篇 |
1996年 | 185篇 |
1995年 | 200篇 |
1994年 | 185篇 |
1993年 | 172篇 |
1992年 | 157篇 |
1991年 | 142篇 |
1990年 | 131篇 |
1989年 | 135篇 |
1988年 | 124篇 |
1987年 | 125篇 |
1986年 | 90篇 |
1985年 | 99篇 |
1984年 | 129篇 |
1983年 | 114篇 |
1982年 | 133篇 |
1981年 | 110篇 |
1980年 | 115篇 |
1979年 | 71篇 |
1978年 | 83篇 |
1977年 | 66篇 |
1976年 | 62篇 |
1974年 | 50篇 |
1973年 | 40篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Kelley Withy MD MS ; January May Andaya; Judith S. Mikami RN MPH ; Seiji Yamada MD MPH 《The Journal of rural health》2007,23(1):84-88
CONTEXT: Health disparities between rural and urban communities are well documented. There are many suggested causes and many proposed solutions but no one-size-fits-all answer. The most successful community interventions have been introduced by communities themselves. However, before communities invest in such interventions, each group must identify and prioritize their needs. PURPOSE: This article describes the Hoshin facilitation method as a practical option assisting communities in assessing their needs and gaining consensus for future steps. METHODS: Thirty-four meetings were held in 11 rural communities in Hawaii using the Hoshin process to identify factors that impact rural health. Themes were identified by constant comparative analysis and thematic frequency described. Commonality of responses between communities was examined. Informal feedback was collected from meeting participants. FINDINGS: There was a great deal of commonality between community responses, with economic factors, drug use, lack of community leadership, lack of health care services and access to services, lack of healthy activities for youth, and poor public education being the most common issues noted. Group involvement in the meetings was high, and the facilitation method received positive feedback from participants. CONCLUSIONS: The Hoshin facilitation method is a very useful tool to help communities rapidly identify and prioritize areas for programmatic attention. 相似文献
32.
33.
Oscar A. Alvarez M.D. Judith A. Maples M.D. Fermin O. Tio M.D. Makau Lee M.D. Ph.D. 《The American journal of gastroenterology》1995,90(8):1350-1351
Cokeromyces recurvatus , a sporangiola-forming dimorphic is a rare cause of urogenital infection in humans. We report here a case of severe watery diarrhea due lo C. recurvains , which was treated successfully with high-dose oral nystatin therapy. We speculate that our patient was probably predisposed to infections due to opportunistic organisms, such as C. recurvatus , because of post-transplantation immunosuppression. To our knowledge, our patient represents the first documented case of diarrhea due to C. recurvatus in man und this ease highlights the potential pathogenic capability of this opportunistic organism in immunosuppressed patients. 相似文献
34.
Rosario Reyes Melissa Haendel Deanna Grant Ellie Melancon Judith S Eisen 《Developmental dynamics》2004,229(1):30-41
Rohon-Beard cells are large, mechanosensory neurons located in the dorsal spinal cord of anamniote vertebrates. In most species studied to date, these cells die during development. We followed labeled Rohon-Beard cells in living zebrafish embryos and found that they degenerate slowly, over many days. During degeneration, the soma shrinks and finally disappears, and the processes become beady in appearance and finally break apart, but they do not retract. Zebrafish Rohon-Beard cells apparently fragment their DNA, as revealed by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) labeling, before undergoing degenerative morphologic changes. We also followed the development of labeled dorsal root ganglion neurons, as they are developing at the same stages that Rohon-Beard cells are degenerating. We found that, although axons of both cell types extend into similar regions, Rohon-Beard cells degenerate normally in mutants lacking dorsal root ganglia, providing evidence that interactions between the two cell types are not responsible for Rohon-Beard cell degeneration. Developmental Dynamics 229:30-41,2004. 相似文献
35.
36.
37.
Eileen Trafimow Ph.D. Marie Weissbourd Ph.D. Judith Wilen Ph.D. 《Journal of Child and Adolescent Group Therapy》1992,2(3):141-148
Traditionally, psychotherapy groups for children included only relatively intact youngsters. This paper describes a group consisting of four (near) psychotic children and two co-therapists which met for over three years. The developmental changes which occurred in the group over the course of time will be identified and discussed using a neo-psychoanalytic, object relations framework. 相似文献
38.
Ming Li Allison Martin Cheng Wen Steven W. Turner Lynley K. Lewis Judith A. Whitworth 《Clinical and experimental pharmacology & physiology》1995,22(12):919-923
1. We tested the ability of ouabain to cause chronic hyper tension by continuously infusing ouabain for 28 days (mini-osmotic pump implantation; i.p.). The blood pressure and metabolic effects of sham (150 mmol/L NaCI; n= 12) or ouabain infusion (10 μg/kg per day; n= 14; 100 μg/kg per day; n = 14) were examined in conscious Sprague-Dawley rats. 2. Plasma ouabain concentrations measured after 28 days of ouabain infusion were as follows: sham, not detectable (n= 11); ouabain 10 μg/kg per day, 0.60 ± 0.07 nmol/L (n= 14); and ouabain 100 μg/kg per day, 7.17 ± 0.57 nmol/L (n= 14; P < 0.001). 3. Sham or ouabain infusion did not alter food intake, bodyweight, water intake or urine output in conscious rats. 4. Blood pressure was not altered by sham treatment. Ouabain at 10 μg/kg per day or 100 μg/kg per day did not produce consistent rises in blood pressure. Ouabain at 10 μg/kg per day increased blood pressure on treatment day 12 only (+ 6mmHg; P < 0.05), while at 100μg/kg per day blood pres sure increased on treatment days 16 (+ 9 mmHg; P < 0.05) and day 18 (+ 8mmHg; P < 0.05) only. There was no significant difference in blood pressure between sham and ouabain groups. 5. Renal blood flow was decreased in rats infused with ouabain at 10 μg/kg per day (2.0 ± 0.3 mL/min per 100 g body-weight; n= 5; P < 0.01) and 100 μg/kg per day (2.2 ± 0.4 mL/ min per 100 g bodyweight; n= 7; P < 0.05) compared with sham treatment (3.5 ± 0.2 mL/min per 100 g bodyweight; n= 6). Renal vascular resistance was increased in rats treated with ouabain at 10 μg/kg per day (65.5 ± 12.6 mmHg/mL per min per 100 g bodyweight; n= 5; P < 0.01) and 100 μg/kg per day (66.0 ± 15.6 mmHg/mL per min per 100 g bodyweight; n= 7; P < 0.05) compared with sham treatment (32.6 ± 2.5 mmHg/mL per min per 100 g bodyweight; n= 6). 6. High plasma concentrations of ouabain do not cause consistent increases in blood pressure in conscious Sprague-Dawley rats. 相似文献
39.
40.