首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   190979篇
  免费   47129篇
  国内免费   568篇
耳鼻咽喉   2052篇
儿科学   7774篇
妇产科学   2571篇
基础医学   27904篇
口腔科学   8233篇
临床医学   36482篇
内科学   35440篇
皮肤病学   4953篇
神经病学   21303篇
特种医学   6551篇
外科学   21218篇
综合类   6114篇
现状与发展   1篇
一般理论   69篇
预防医学   23622篇
眼科学   1679篇
药学   14904篇
  127篇
中国医学   2595篇
肿瘤学   15084篇
  2024年   262篇
  2023年   2797篇
  2022年   3495篇
  2021年   6214篇
  2020年   10495篇
  2019年   15484篇
  2018年   14817篇
  2017年   15582篇
  2016年   14406篇
  2015年   14133篇
  2014年   16666篇
  2013年   17669篇
  2012年   14435篇
  2011年   14496篇
  2010年   12101篇
  2009年   8815篇
  2008年   9121篇
  2007年   7637篇
  2006年   6982篇
  2005年   6304篇
  2004年   5811篇
  2003年   5035篇
  2002年   4491篇
  2001年   3580篇
  2000年   2279篇
  1999年   1088篇
  1998年   729篇
  1997年   577篇
  1996年   499篇
  1995年   379篇
  1994年   355篇
  1993年   306篇
  1992年   236篇
  1991年   213篇
  1990年   185篇
  1989年   127篇
  1988年   108篇
  1987年   105篇
  1986年   90篇
  1985年   115篇
  1984年   100篇
  1983年   78篇
  1982年   59篇
  1981年   57篇
  1980年   48篇
  1979年   30篇
  1978年   17篇
  1977年   20篇
  1976年   12篇
  1975年   12篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ABSTRACT

The lack of stable housing can impair access and continuity of care for patients living with human immunodeficiency virus (HIV). This study investigated the relationship between housing status assessed at multiple time points and several core HIV-related outcomes within the same group of HIV patients experiencing homelessness. Patients with consistently stable housing (CSH) during the year were compared to patients who lacked CSH (non-CSH group). The study outcomes included HIV viral load (VL), CD4 counts, and health care utilization. Multivariable and propensity weighted analyses were used to assess outcomes adjusting for potential group differences. Of 208 patients, 88 (42%) had CSH and 120 (58%) were non-CSH. Patients with CSH had significantly higher proportion of VL suppression and higher mean CD4 counts. The frequency of nurse visits in the CSH group was less than a half of that in the non-CSH group. Patients with CSH were less likely to be admitted to the medical respite facility, and if admitted, their length of stay was about a half of that for the non-CSH group. Our study findings show that patients with CSH had significantly better HIV virologic control and immune status as well as improved health care utilization.  相似文献   
2.
Although depression is associated to physical discomfort, meanings of the body in depression are rarely addressed in clinical research. Drawing on the concept of the lived body, this study explores depression as an embodied phenomenon. Using a hermeneutic phenomenological approach, the analysis of narrative‐based interviews with 11 depressed adults discloses a thematic structure of an embodied process of an ambiguous striving against fading. Five subthemes elicit different dimensions of this process, interpreted as disabling or enabling: feeling estranged, feeling confined, feeling burdensome, sensing life and seeking belongingness. In relation to clinical practice, we suggest that the interdisciplinary team can focus on enhancing the enabling dimensions, for example through guided physical activities to support the patient to feel more alive, capable and connected. Moreover, we suggest that the treatment process benefits from an increased awareness of the ambiguity in the patient's struggle, acknowledging both destructive and recharging elements of the withdrawing, and the perceived conflict in‐between.  相似文献   
3.

Background and objective

Pressure ulcer (PU) is one of the important and frequent complications of hospitalization, associated with high treatment costs. The present study was conducted to determine the incidence of PU and its direct treatment costs for patients in intensive care unit (ICU) in Iran.

Material and methods

In this retrospective study, medical records of 643 discharged patients from ICU of two selected hospitals were examined. The demographic and clinical data of all patients and data of resources and services usage for patients with PU were extracted through their records. Data analysis was done using logistic regression tests in SPSS 22 software. The cost of PU treatment was calculated for each grade of ulcer.

Results

The findings showed that 8.9% of patients developed PU during their stay in ICU. Muscular paralysis (OR?=?5.1), length of stay in ICU (OR?=?4.0), diabetes (OR?=?3.5) age (OR?=?2.9), smoking (OR?=?2.1) and trauma (OR?=?1.4) were the most important risk factors of PU. The average cost of PU treatment varied from USD 12 for grade I PU to USD 66?834 for grade IV PUs. The total treatment costs for all studied patients with PU was estimated at USD 519?991.

Conclusion

The cost of PU treatment is significant. Since the preventive measures are more cost-effective than therapeutic measures, therefore, effective preventive interventions are recommended.  相似文献   
4.
5.
6.
7.
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号