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   7931篇
  免费   477篇
  国内免费   40篇
耳鼻咽喉   85篇
儿科学   218篇
妇产科学   123篇
基础医学   1168篇
口腔科学   165篇
临床医学   560篇
内科学   2078篇
皮肤病学   305篇
神经病学   637篇
特种医学   243篇
外科学   711篇
综合类   54篇
一般理论   1篇
预防医学   492篇
眼科学   156篇
药学   559篇
中国医学   42篇
肿瘤学   851篇
  2024年   12篇
  2023年   61篇
  2022年   136篇
  2021年   208篇
  2020年   134篇
  2019年   170篇
  2018年   218篇
  2017年   203篇
  2016年   214篇
  2015年   201篇
  2014年   328篇
  2013年   365篇
  2012年   505篇
  2011年   600篇
  2010年   358篇
  2009年   360篇
  2008年   470篇
  2007年   562篇
  2006年   506篇
  2005年   545篇
  2004年   534篇
  2003年   469篇
  2002年   418篇
  2001年   79篇
  2000年   57篇
  1999年   63篇
  1998年   72篇
  1997年   54篇
  1996年   53篇
  1995年   37篇
  1994年   27篇
  1993年   28篇
  1992年   26篇
  1991年   26篇
  1990年   33篇
  1989年   27篇
  1988年   21篇
  1987年   23篇
  1986年   26篇
  1985年   20篇
  1984年   20篇
  1983年   13篇
  1981年   11篇
  1980年   13篇
  1979年   11篇
  1978年   11篇
  1974年   12篇
  1972年   12篇
  1970年   10篇
  1968年   10篇
排序方式: 共有8448条查询结果,搜索用时 15 毫秒
51.
We previously reported that healthy adult males who consumed coix seeds for 1 week demonstrated an increased intestinal abundance of Faecalibacterium prausnitzii and altered peripheral lymphocyte subset percentages. However, the mechanism underlining these effects has not been elucidated. Therefore, cytokines and metabolites in plasma obtained in this study are comprehensively analyzed. A total of 56 cytokines and 52 metabolites in the plasma are quantified. Among them, 14 cytokines and 9 metabolites show significant changes in their levels following coix seed consumption. We examine the relationship between these changes and those in peripheral lymphocyte subset percentages and intestinal abundance of F. prausnitzii, which is also considerably altered following coix seed consumption. The galectin-9 concentration considerably decreased after coix seed consumption, and these changes correlate with those in cytotoxic T cells and pan T cells. Therefore, galectin-9 is possibly involved in the changes in peripheral lymphocyte subset percentages induced by coix seed consumption.  相似文献   
52.
53.
Objective: The purpose of this study was to examine the relationship betweenthe emotional intelligence quotient and health-related quality of life using structuralequation modeling.Methods: A self-administered questionnaire survey was conducted among 1,911mothers who visited the Health Center for an infant medical examination. A hypotheticalmodel was constructed using variables of the emotional intelligence quotient, socialsupport, coping, parenting stress, and perceived health competence.Result: There were a total of 1,104 valid responses (57.8%). Significantstandardized estimates were obtained, confirming the goodness of fit issues with themodel. The emotional intelligence quotient had a strong impact on physical andpsychological quality of life, and showed the greatest association with coping. This studydiffered from previous studies in that, due to the inclusion of social support andexplanatory variables in coping, an increase in coping strategies was more highlyassociated with emotional intelligence quotient levels than with social support.Conclusion: An enhanced emotional intelligence quotient should be considereda primary objective to promote the health of mothers with infant children.  相似文献   
54.
55.
56.
57.
An axial radiograph of the zygomatic arch is taken in cases of patients with facial traumatic injury. Maintaining the patient's head in the retroflex position to take such axial radiographs is sometimes difficult because of medical conditions. In addition, since different positioning techniques for retroflexion are used by radiological technologists, the visibility of the zygomatic arch was poorly in reproduced. We contrived a novel technique for use in taking a zygomatic arch radiograph. We call it the "bisector method," and it does not require the retroflex position. We can take a zygomatic arch radiograph equal in quality to conventional axial radiographs (retroflex position) by exposing X-rays perpendicularly to the bisector of the angle between the casette and the zygomatic arch. This bisector method is relatively easy in that it does not require either the retroflex position or the expertise of a radiological technologist.  相似文献   
58.
A 62-year-old man presented with a giant tumor in the pelvic cavity that was incidentally revealed by abdominal ultrasonography. Abdominal magnetic resonance imaging showed the heterogenous tumor in the pelvis with cystic components. The tumor was 10.8 × 10.5 × 11.7 cm in diameter and adhered to the sacral wall. The tumor was extirpated following diagnosis as a benign neurogenic tumor by needle biopsy. The pelvic cavity was occupied by the tumor rigidly adhered to the sacrum. The histopathological diagnosis of the specimen was benign schwannoma, type Antoni A.  相似文献   
59.
This report describes a previously 28-year-old healthy woman, identified as an asymptomatic human T-lymphotropic virus type I (HTLV-I) carrier, who developed both progressive multifocal leukoencephalopathy (PML) and Pneumocystis jiroveci pneumonia. For diagnostic confirmation of PML, stereotactic brain biopsy demonstrated multiple demyelinating lesions with the presence of JC viral antigen. Intramuscular alpha-interferon therapy for 2 weeks brought considerable neurologic improvement. Three years later, the patient developed lymphoma-type of adult T-cell leukemia, suggesting that HTLV-I carrier might be one of the underlying diseases of PML.  相似文献   
60.
Objective. To assess the orthotic effect of a functional electrical stimulation device (Akita Heel Sensor System; AHSS) in the treatment of hemiplegic gait with foot drop. Materials and Methods. In the AHSS, a heel sensor is attached to a small plastic heel brace, and the peroneal nerve is stimulated via percutaneous intramuscular electrodes. During the swing phase of the hemiplegic gait, the common peroneal nerve is stimulated by the AHSS. Eight patients in chronic stages of hemiplegia participated in this study. Walking speeds and step cadences on a 10‐m course were compared between walking with stimulation and walking without stimulation. Results. Mean walking speed (± SD) was 0.50 ± 0.26 m/sec without stimulation and 0.64 ± 0.31 m/sec with stimulation. The mean percentage increase in walking speed with stimulation was 30.1%. Mean step cadence was 31 ± 7 steps/10 m without stimulation and 27 ± 7 steps/10 m with stimulation. By correcting foot drop, the AHSS significantly increased walking speed and decreased cadence (p < 0.05). Conclusion. The AHSS can significantly improve walking in hemiplegic patients with foot drop.  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