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   741篇
  免费   50篇
  国内免费   6篇
耳鼻咽喉   15篇
儿科学   24篇
妇产科学   9篇
基础医学   101篇
口腔科学   15篇
临床医学   40篇
内科学   143篇
皮肤病学   18篇
神经病学   19篇
特种医学   9篇
外科学   93篇
综合类   7篇
预防医学   42篇
眼科学   112篇
药学   72篇
中国医学   2篇
肿瘤学   76篇
  2023年   6篇
  2022年   33篇
  2021年   28篇
  2020年   15篇
  2019年   24篇
  2018年   21篇
  2017年   20篇
  2016年   27篇
  2015年   28篇
  2014年   28篇
  2013年   39篇
  2012年   58篇
  2011年   68篇
  2010年   35篇
  2009年   32篇
  2008年   47篇
  2007年   39篇
  2006年   32篇
  2005年   43篇
  2004年   46篇
  2003年   24篇
  2002年   18篇
  2001年   11篇
  2000年   19篇
  1999年   11篇
  1998年   5篇
  1997年   4篇
  1996年   2篇
  1994年   2篇
  1993年   2篇
  1992年   1篇
  1990年   2篇
  1989年   3篇
  1988年   1篇
  1987年   3篇
  1986年   4篇
  1985年   1篇
  1983年   4篇
  1982年   2篇
  1979年   1篇
  1978年   1篇
  1975年   1篇
  1973年   3篇
  1971年   2篇
  1969年   1篇
排序方式: 共有797条查询结果,搜索用时 15 毫秒
781.
782.
783.
Familial multiple intestinal atresias is an autosomal recessive disease with or without combined immunodeficiency. In the last year, several reports have described mutations in the gene TTC7A as causal to the disease in different populations. However, exact correlation between different genotypes and various phenotypes are not clear. In this study, we report identification of novel compound heterozygous mutations in TTC7A gene in a Malay girl with familial multiple intestinal atresias and severe combined immunodeficiency (MIA‐SCID) by whole exome sequencing. We found two mutations in TTC7A: one that destroyed a putative splicing acceptor at the junction of intron 17/exon 18 and one that introduced a stop codon that would truncate the last two amino acids of the encoded protein. Reviewing the recent reports on TTC7A mutations reveals correlation between the position and nature of the mutations with patient survival and clinical manifestations. Examination of public databases also suggests carrier status for healthy individuals, making a case for population screening on this gene, especially in populations with suspected frequent founder mutations.  相似文献   
784.
We present the case of a young man with type II diabetes, stage III chronic kidney disease, hypertension, obstructive sleep apnea and diabetes who presented to the Georgetown University Hospital Center for Wound Healing with refractory lower extremity ulcers. Autoimmune work-up was negative. However, chromosome analysis showed a genetic variant of Klinefelter's syndrome (48 XXYY). Lower extremity ulceration is a recognised complication of Klinefelter's syndrome. The pathogenesis of ulcers in this endocrinopathy is unclear, but associations with abnormalities of fibrinolysis and prothrombotic states are reported. This case emphasises the importance of considering Klinefelter's syndrome in the differential diagnosis of a sterile male patient with non healing lower extremity ulcers.  相似文献   
785.
786.
Glycaemic index of three Indian rice varieties   总被引:1,自引:0,他引:1  
Three commonly consumed Indian rice varieties (Sona Masuri, Ponni and Surti Kolam) were tested for their glycaemic index (GI). Healthy volunteers were recruited and after an overnight fast were given a 50 g available carbohydrate portion of glucose (reference food) or different varieties of cooked rice (test foods) on separate occasions. The fasting as well as postprandial capillary blood glucose response was determined over 2 h, and the incremental area under the curve (IAUC) was calculated. The GI was calculated as the IAUC of the test food/IAUC of the reference food (glucose) × 100. The differences between the GI values for Sona Masuri (72.0 ± 4.5), Ponni (70.2 ± 3.6) and Surti Kolam (77.0 ± 4.0) rice varieties were non-significant (p = 0.606) and are all classified as high GI varieties of rice. There is an urgent need to study the GI of other commonly consumed rice varieties and to develop rice of a lower GI value.  相似文献   
787.

Objectives

The objective of this study was to evaluate the feasibility and efficacy of ERAS pathways in patients undergoing emergency simple closure of perforated duodenal ulcer (PDU).

Methods

This single-center, prospective, open-labeled, superiority, RCT was carried out from August 2014 to July 2016. Patients of PDU undergoing open simple closure were randomized preoperatively in 1:1 ratio into standard care and adapted ERAS group. Patients with refractory shock, ASA class ≥3, and perforation size ≥1 cm were excluded. Primary outcome was the length of hospitalization (LOH). Secondary outcomes were functional recovery parameters and morbidity.

Results

Forty-nine and 50 patients were included in standard care and ERAS group, respectively. Patients in ERAS group had a significantly early functional recovery (days) for the time to first flatus (1.47 ± 0.18; p < 0.001), first stool (2.25 ± 0.20; p < 0.001), first fluid diet (2.72 ± 0.38; p < 0.001), and solid diet (3.70 ± 0.44; p < 0.001). LOH in ERAS group was significantly shorter (mean difference of 4.41 ± 0.64 days; p < 0.001). There was a significant reduction in postoperative morbidity such as superficial SSI (RR 0.35, p = 0.02), postoperative nausea and vomiting (RR 0.28, p < 0.0001), and pulmonary complications (RR 0.24, p = 0.04) in the ERAS vs. standard care group with similar leak rates (1/50 vs.2/49).

Conclusion

ERAS pathways are safe and feasible in select patients undergoing emergency simple closure of PDU.
  相似文献   
788.
789.
Primary lymphomas of the skull are extremely rare, as fewer than 20 cases have been reported in the literature. We describe the case of a 51-year-old woman with Huntington chorea who presented with forehead swelling. Imaging studies detected an enhancing mass in the skull with some destruction of the underlying bone. These features were suggestive of osteomyelitis. Surgical excision was performed, and the mass was found to be a primary diffuse large B-cell lymphoma. The patient was administered postoperative chemotherapy, and she was in complete remission at the 1-year follow-up.  相似文献   
790.
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