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   4736篇
  免费   260篇
  国内免费   35篇
耳鼻咽喉   69篇
儿科学   64篇
妇产科学   90篇
基础医学   572篇
口腔科学   110篇
临床医学   416篇
内科学   1640篇
皮肤病学   58篇
神经病学   299篇
特种医学   142篇
外科学   624篇
综合类   9篇
预防医学   185篇
眼科学   12篇
药学   256篇
中国医学   9篇
肿瘤学   476篇
  2023年   23篇
  2022年   50篇
  2021年   88篇
  2020年   66篇
  2019年   81篇
  2018年   87篇
  2017年   92篇
  2016年   107篇
  2015年   124篇
  2014年   142篇
  2013年   222篇
  2012年   332篇
  2011年   374篇
  2010年   182篇
  2009年   166篇
  2008年   311篇
  2007年   297篇
  2006年   326篇
  2005年   274篇
  2004年   261篇
  2003年   231篇
  2002年   213篇
  2001年   90篇
  2000年   79篇
  1999年   72篇
  1998年   43篇
  1997年   33篇
  1996年   35篇
  1995年   37篇
  1994年   28篇
  1993年   20篇
  1992年   50篇
  1991年   50篇
  1990年   36篇
  1989年   39篇
  1988年   32篇
  1987年   36篇
  1986年   32篇
  1985年   37篇
  1984年   25篇
  1983年   22篇
  1982年   12篇
  1981年   12篇
  1979年   18篇
  1977年   14篇
  1976年   12篇
  1974年   13篇
  1973年   14篇
  1971年   13篇
  1969年   11篇
排序方式: 共有5031条查询结果,搜索用时 15 毫秒
61.
BACKGROUND: Surgical treatment in the patient effected by secondary hyperparathyroidism consists in subtotal parathyroidectomy or total parathyroidectomy plus autotransplantation of parathyroid tissue. METHODS: The results obtained with surgical treatment of 6 patients observed in the years 1995-1996 are analyzed. Two glands were hyperplastic in four patients, 3 in the others. Every patient was submitted to a subtotal parathyroidectomy. RESULTS: Postoperative course was marked by transient hypoparathyroidism in one case. After 18 months of follow-up, no recurrences were observed. CONCLUSIONS: It is pointed out that in case of secondary hyperparathyroidism subtotal parathyroidectomy represents the surgical treatment of choice, according with literature data. Otherwise total parathyroidectomy plus autotransplantation, characterized by a more complex surgical technique, lead to the same results.  相似文献   
62.
63.
Abstract

Triticum monococcum L. is one of the oldest ancestors of wheat. There is some evidence that einkorn encloses forms of gliadin-deriving peptides which may potentially exert a reduced toxicity to consumers with gluten-related disorders. Accordingly, ID331 and Monlis lines were comparatively investigated in this study. The biological effects of gastro-resistant peptides deriving from an in vitro simulated digestion were evaluated on 21 d differentiated Caco-2 cells. Triticum aestivum digested gliadin was included as the positive control. ID331 neither enhanced cell permeability nor induced zonulin release in Caco-2 monolayers. Monlis exerted a detectable toxicity as confirmed by the reorganisation of enterocyte cytoskeleton, in addition to changes both in monolayers permeability and apical release of zonulin. Differences in patterns of gastro-resistant prolamins may account for the differences. Outcomes support the use of ID331 as a prospective candidate for the development of innovative approaches to reduce wheat flour toxicity.  相似文献   
64.
Persistent tracheal fistula after tracheostomy decannulation is a recognized sequel to long-term tracheostomy use, causing important morbidity including difficult to vocalization and control of air secretions, recurrent pulmonary infections, and cosmetic and social problems. Herein, we reported a new method for closure of persistent tracheocutaneous fistula with rib cartilages. Compared to other techniques previously reported, the variations of our strategy were the use of temporary metal-covered tracheal stent and the hinged turnover skin bi-flaps reinforced with rib cartilage grafts. Rib cartilages were useful in order to reconstruct the trachea and prevent stenosis. Since it become difficult to obtain the maintenance of the trachea stability until healing of suture was well established, a covered metallic stent was also inserted to avoid flap collapse. The stent was removed 3 months later. Six months follow-up showed normal tracheal patency.  相似文献   
65.
66.
67.
68.
69.
BackgroundIn the phase III MDS-005 study of patients with lower-risk, non-del(5q) myelodysplastic syndromes, lenalidomide was associated with a higher rate of ≥ 8 weeks red blood cell transfusion independence (RBC-TI) compared with placebo, but also with a higher risk of hematologic adverse events (AEs).Patients and MethodsThis analysis evaluated the ratio of clinical benefit-risk in patients treated with lenalidomide or placebo, and assessed the effect of lenalidomide dose reductions on response. Clinical benefit was a composite endpoint defined as RBC-TI, transfusion reduction ≥ 4 units packed red blood cells, hemoglobin increase ≥ 1.5 g/dL, or cytogenetic response.ResultsThe rate of clinical benefit was higher with lenalidomide than with placebo (31.9% vs. 3.8%). The ratio of response (RBC-TI and clinical benefit) to risk (hematologic AEs) favored lenalidomide over placebo. Patients who underwent ≥ 1 lenalidomide dose reduction had a longer duration of treatment, received a higher cumulative dose, and were more likely to experience clinical benefit versus patients without dose reductions.ConclusionDespite the occurrence of hematologic AEs, the overall benefit-risk profile supported lenalidomide treatment. Appropriate management of hematologic AEs by dose reductions may help patients with myelodysplastic syndromes to remain on treatment and achieve clinical benefit.  相似文献   
70.
Treatment pressure restricts patients' voluntary and autonomous decisions. Yet interventions involving treatment pressure are widely used in mental health and psychosocial services. This cross-sectional study explored whether mental health professionals' knowledge on five types of treatment pressure (no coercion, persuasion or conviction, leverage, threat, and formal coercion) was associated with sociodemographic, professional and contextual factors. A more positive attitude towards interventions involving treatment pressure was associated with underrating the level of those interventions compared with a predefined default value. The treatment setting and professional group played a minor role in ‘leverage’ and ‘formal coercion’ types of treatment pressure, respectively.  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