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   3915篇
  免费   215篇
  国内免费   14篇
耳鼻咽喉   54篇
儿科学   391篇
妇产科学   71篇
基础医学   488篇
口腔科学   169篇
临床医学   287篇
内科学   708篇
皮肤病学   104篇
神经病学   239篇
特种医学   95篇
外国民族医学   3篇
外科学   420篇
综合类   135篇
一般理论   2篇
预防医学   248篇
眼科学   116篇
药学   308篇
中国医学   22篇
肿瘤学   284篇
  2023年   24篇
  2022年   26篇
  2021年   135篇
  2020年   73篇
  2019年   103篇
  2018年   139篇
  2017年   104篇
  2016年   129篇
  2015年   124篇
  2014年   182篇
  2013年   233篇
  2012年   335篇
  2011年   301篇
  2010年   178篇
  2009年   139篇
  2008年   222篇
  2007年   233篇
  2006年   204篇
  2005年   148篇
  2004年   176篇
  2003年   117篇
  2002年   124篇
  2001年   50篇
  2000年   62篇
  1999年   52篇
  1998年   22篇
  1997年   21篇
  1996年   23篇
  1995年   13篇
  1994年   15篇
  1993年   21篇
  1992年   40篇
  1991年   34篇
  1990年   37篇
  1989年   42篇
  1988年   19篇
  1987年   26篇
  1986年   26篇
  1985年   23篇
  1984年   17篇
  1983年   18篇
  1982年   9篇
  1981年   11篇
  1980年   12篇
  1979年   15篇
  1978年   9篇
  1977年   9篇
  1976年   11篇
  1974年   12篇
  1973年   8篇
排序方式: 共有4144条查询结果,搜索用时 46 毫秒
91.
92.
93.

OBJECTIVE

Latinos with type 2 diabetes (T2D) face major healthcare access and disease management disparities. We examined the impact of the Diabetes Among Latinos Best Practices Trial (DIALBEST), a community health worker (CHW)–led structured intervention for improving glycemic control among Latinos with T2D.

RESEARCH DESIGN AND METHODS

A total of 211 adult Latinos with poorly controlled T2D were randomly assigned to a standard of healthcare (n = 106) or CHW (n = 105) group. The CHW intervention comprised 17 individual sessions delivered at home by CHWs over a 12-month period. Sessions addressed T2D complications, healthy lifestyles, nutrition, healthy food choices and diet for diabetes, blood glucose self-monitoring, and medication adherence. Demographic, socioeconomic, lifestyle, anthropometric, and biomarker (HbA1c, fasting blood glucose, and lipid profile) data were collected at baseline and 3, 6, 12, and 18 months (6 months postintervention). Groups were equivalent at baseline.

RESULTS

Participants had high HbA1c at baseline (mean 9.58% [81.2 mmol/mol]). Relative to participants in the control group, CHWs had a positive impact on net HbA1c improvements at 3 months (−0.42% [−4.62 mmol/mol]), 6 months (−0.47% [−5.10 mmol/mol]), 12 months (−0.57% [−6.18 mmol/mol]), and 18 months (−0.55% [−6.01 mmol/mol]). The overall repeated-measures group effect was statistically significant (mean difference −0.51% [−5.57 mmol/mol], 95% CI −0.83, −0.19% [−9.11, −2.03 mmol/mol], P = 0.002). CHWs had an overall significant effect on fasting glucose concentration that was more pronounced at the 12- and 18-month visits. There was no significant effect on blood lipid levels, hypertension, and weight.

CONCLUSIONS

DIALBEST is an effective intervention for improving blood glucose control among Latinos with T2D.  相似文献   
94.
95.
CytoSorb® (CytoSorbents Corporation, USA) is a novel sorbent hemoadsorption device for cytokine removal. The aim of this study was to examine the clinical use of CytoSorb® in the management of patient with septic shock. We used this device as an adjuvant to stabilize a young patient with multi-organ failure and severe sepsis with septic shock. A 36-year-old female patient was hospitalized with the complaints of malaise, general body ache, and breathing difficulty and had a medical history of diabetes mellitus type II, hypertension, obstructive sleep apnea, hypothyroidism and morbid obesity. She was diagnosed to have septic shock with multi-organ dysfunction (MODS) and a low perfusion state. CytoSorb® hemoadsorption column was used as an attempt at blood purification. Acute physiology and chronic health evaluation score, MODS score, and sequential organ failure assessment score were measured before and after the device application. CytoSorb application as an adjuvant therapy could be considered in septic shock.  相似文献   
96.

Background:

Acute kidney injury (AKI) is common in patients in the pediatric intensive care unit (PICU) and is associated with poor outcome. We conducted the present study to determine the incidence, risk factors and outcomes of AKI in the PICU.

Materials and Methods:

We collected data retrospectively from case records of children admitted to the PICU during one year. We defined and classified AKI according to modified pRIFLE criteria. We used multivariate logistic regression to determine risk factors of AKI and association of AKI with mortality and morbidity.

Results:

Of the 252 children included in the study, 103 (40.9%) children developed AKI. Of these 103 patients with AKI, 39 (37.9%) patients reached pRIFLE max of Risk, 37 (35.9%) patients reached Injury, and 27 (26.2%) had Failure. Mean Pediatric Risk of Mortality (PRISM III) score at admission was higher in patients with AKI than in controls (P < 0.001).  相似文献   
97.
Pigeon dropping is a kind of organic waste which can be transformed easily into organic manure by vermicomposting with exotic earthworm Eisenia fetida. In the present study, a pigeon excreta was collected from roof tops. The pigeon excreta was mixed with cattle dung with the ratios as 10%, 20%, 30%, 40% and 50% respectively, in plastic containers; meanwhile, those proposal were name as C10, C20, C30, C40 and C50 respectively. Feed mixtures were allowed to decompose (pre-vermicomposting without earthworm) for 20–25 days. After decomposition, 20 hatchlings of E. fetida were put in each concentration after weighing. Cattle dung (without pigeon excreta) was kept as the control. The physico-chemical analysis of initial feed mixture and final product after vermicomposting was also done to measure the changes in the feed mixtures from the initial to the final states. There were increases in the content of N (52.35%), P (115.79%), K (39.97%) and EC (56.16%) but decrease in those of OC (-15.49%), OM (-15.49%), pH (-7.92%) and Ca (-39.62%) from the initial to the final product. The highest population size of earthworms and minimum mortality rate was observed in C30 feed mixture. Thus, the present study indicated that cattle dung mixed with 30% (w/w) pigeon excreta waste may be a good choice for vermicomposting.  相似文献   
98.
99.
Infective endocarditis is extremely rare in children with structurally normal hearts. The most common etiological agents are staphylococcal and streptococcal species. Nutritionally variant streptococci also classified as Abiotrophia species are a group of fastidious organisms that account for only 5% to 6% of all cases of culture‐negative infective endocarditis. Only seven cases of Abiotrophia infective endocarditis have been previously reported in children with no underlying structural heart disease. We report two cases of Abiotrophia infective endocarditis in children without any predisposing factors. Both patients presented with nonspecific symptoms leading to delay in diagnosis. While bacteriological clearance was achieved in both cases, both had a complicated course including development of brain mycotic aneurysms, splenic infarction, renal failure, and irreversible damage to the mitral valve. Both patients required surgical removal of the native mitral valve and replacement. We also present review of seven cases with similar diagnosis published previously in literature and highlight important differences. Our cases highlight special challenges in management of Abiotrophia endocarditis in pediatric patients. As the organism may not be isolated in routine culture media, may present with atypical clinical symptoms and may have a complicated course even without antibiotic failure, a high index of suspicion should be maintained in children with subacute symptoms even with no underlying structural cardiac disease.  相似文献   
100.
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