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   2431篇
  免费   172篇
  国内免费   18篇
耳鼻咽喉   22篇
儿科学   139篇
妇产科学   69篇
基础医学   365篇
口腔科学   74篇
临床医学   218篇
内科学   532篇
皮肤病学   51篇
神经病学   157篇
特种医学   65篇
外科学   271篇
综合类   28篇
一般理论   2篇
预防医学   144篇
眼科学   114篇
药学   157篇
中国医学   13篇
肿瘤学   200篇
  2024年   4篇
  2023年   50篇
  2022年   81篇
  2021年   143篇
  2020年   91篇
  2019年   120篇
  2018年   142篇
  2017年   114篇
  2016年   106篇
  2015年   80篇
  2014年   120篇
  2013年   164篇
  2012年   227篇
  2011年   198篇
  2010年   138篇
  2009年   80篇
  2008年   149篇
  2007年   135篇
  2006年   113篇
  2005年   83篇
  2004年   97篇
  2003年   70篇
  2002年   60篇
  2001年   6篇
  2000年   7篇
  1999年   5篇
  1998年   9篇
  1997年   6篇
  1996年   4篇
  1995年   6篇
  1994年   4篇
  1993年   2篇
  1991年   1篇
  1990年   1篇
  1987年   1篇
  1986年   1篇
  1976年   2篇
  1967年   1篇
排序方式: 共有2621条查询结果,搜索用时 15 毫秒
61.
62.
This pilot study evaluated the experience of people with co-occurring disorders (mental illness and addiction) in relation to peer-led and professional-led group interventions. The study used a qualitative (phenomenological) approach to evaluate the experience of a convenience sample of 6 individuals with co-occurring disorders who participated in up to 8 sessions each of both peer-led and professional-led group interventions (with a similar rate of attendance in both groups). The semi-structured interview data were coded and thematically analyzed. We found 5 themes within and across the 2 interventions. In both groups, participants experienced a positive environment and personal growth, and learned, albeit different things. They were more comfortable in the peer-led group and acquired more knowledge and skills in the professional-led group. Offering both peer-led and professional-led group interventions to people with co-occurring disorders may be better than offering either alone  相似文献   
63.
64.
65.

Aim and Background

Pancreatic cystic lesions are being increasingly recognized and comprise different pathological entities. The management of these lesions is often challenging, because of inadequate preoperative diagnosis. Among this family of lesions, mature cystic teratomas are an extremely rare finding and are usually found in children.

Case Report

We present the rare case of a 60-year-old man being evaluated for melena. Preoperative investigation revealed a pancreatic mass. The patient underwent a Whipple pancreaticoduodenectomy. Surprisingly, histopathology revealed a mature teratoma of the pancreas.

Conclusion

This case highlights the difficulty in establishing a preoperative diagnosis of this benign pathological entity. Though unusual in older patients, mature teratomas can present in this subgroup of patients. Mimicking malignancy, they warrant a radical surgical resection.  相似文献   
66.
67.
68.

BACKGROUND

Reducing symptom burden is paramount at the end-of-life, but typically considered secondary to risk factor control in chronic disease, such as diabetes. Little is known about the symptom burden experienced by adults with type 2 diabetes and the need for symptom palliation.

OBJECTIVE

To examine pain and non-pain symptoms of adults with type 2 diabetes over the disease course ?C at varying time points before death and by age.

DESIGN

Survey follow-up study.

PARTICIPANTS

13,171 adults with type 2 diabetes, aged 30?C75?years, from Kaiser Permanente, Northern California, who answered a baseline symptom survey in 2005?C2006.

MAIN MEASURES

Pain and non-pain symptoms were identified by self-report and medical record data. Survival status from baseline was categorized into ??6, >6?C24, or alive >24?months.

KEY RESULTS

Mean age was 60?years; 48?% were women, and 43?% were non-white. Acute pain was prevalent (41.8?%) and 39.7?% reported chronic pain, 24.6?% fatigue, 23.7?% neuropathy, 23.5?% depression, 24.2?% insomnia, and 15.6?% physical/emotional disability. Symptom burden was prevalent in all survival status categories, but was more prevalent among those with shorter survival, p?<?.001. Adults ??60?years who were alive >24?months reported more physical symptoms such as acute pain and dyspnea, whereas participants <60?years reported more psychosocial symptoms, such as depressed mood and insomnia. Adjustment for duration of diabetes and comorbidity reduced the association between age and pain, but did not otherwise change our results.

CONCLUSIONS

In a diverse cohort of adults with type 2 diabetes, pain and non-pain symptoms were common among all patients, not only among those near the end of life. However, symptoms were more prevalent among patients with shorter survival. Older adults reported more physical symptoms, whereas younger adults reported more psychosocial symptoms. Diabetes care management should include not only good cardiometabolic control, but also symptom palliation across the disease course.  相似文献   
69.

BACKGROUND  

Quality care depends on effective communication between caregivers, but it is unknown whether time spent communicating is associated with communication outcomes.  相似文献   
70.
AIM: To investigate morphological changes of intestinal smooth muscle contractile fibres in small bowel atresia patients.METHODS: Resected small bowel specimens from small bowel atresia patients (n = 12) were divided into three sections (proximal, atretic and distal). Standard histology hematoxylin-eosin staining and enzyme immunohistochemistry was performed to visualize smooth muscle contractile markers α-smooth muscle actin (SMA) and desmin using conventional paraffin sections of the proximal and distal bowel. Small bowel from age-matched patients (n = 2) undergoing Meckel’s diverticulum resection served as controls.RESULTS: The smooth muscle coat in the proximal bowel of small bowel atresia patients was thickened compared with control tissue, but the distal bowel was unchanged. Expression of smooth muscle contractile fibres SMA and desmin within the proximal bowel was slightly reduced compared with the distal bowel and control tissue. There were no major differences in the architecture of the smooth muscle within the proximal bowel and the distal bowel. The proximal and distal bowel in small bowel atresia patients revealed only minimal differences regarding smooth muscle morphology and the presence of smooth muscle contractile filament markers.CONCLUSION: Changes in smooth muscle contractile filaments do not appear to play a major role in postoperative motility disorders in small bowel atresia.  相似文献   
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