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   700篇
  免费   37篇
  国内免费   7篇
耳鼻咽喉   9篇
儿科学   112篇
妇产科学   29篇
基础医学   52篇
口腔科学   16篇
临床医学   64篇
内科学   136篇
皮肤病学   76篇
神经病学   30篇
特种医学   8篇
外科学   98篇
综合类   9篇
一般理论   1篇
预防医学   32篇
眼科学   18篇
药学   37篇
肿瘤学   17篇
  2023年   11篇
  2022年   15篇
  2021年   15篇
  2020年   14篇
  2019年   24篇
  2018年   21篇
  2017年   20篇
  2016年   18篇
  2015年   32篇
  2014年   32篇
  2013年   47篇
  2012年   39篇
  2011年   41篇
  2010年   38篇
  2009年   24篇
  2008年   50篇
  2007年   66篇
  2006年   49篇
  2005年   53篇
  2004年   39篇
  2003年   36篇
  2002年   26篇
  2001年   4篇
  2000年   1篇
  1999年   4篇
  1998年   2篇
  1997年   2篇
  1996年   1篇
  1995年   6篇
  1994年   2篇
  1993年   4篇
  1992年   1篇
  1991年   1篇
  1989年   1篇
  1986年   1篇
  1985年   1篇
  1982年   2篇
  1978年   1篇
排序方式: 共有744条查询结果,搜索用时 15 毫秒
61.
Pregnancy in adolescence has been and continues to be a problem in public health. The purpose of this study was to investigate obstetric outcomes of adolescent pregnancies in Samsun, Turkey. A cross-sectional study was conducted between January 1 and December 31, 2004, at 3 hospitals in Samsun, Turkey. Of the 10,100 women who gave birth during this period, 357 (3.5%) were 18 years of age or younger; these patients were included in the study. Participants with a history of any chronic disease were excluded. Data were provided as median values (minmax) and percentages. In this study, the rate of birth for females 18 years or younger was found to be 35 per 1000. The median age of participants was 18 (14–18) years. The prevalence of cesarean section was calculated at 55.7%. Prevalences of lowbirthweight infants, preterm delivery, and eclampsia/preeclampsia were recorded as 44 (12.3%), 34 (9.5%), and 30 (8.4%) cases, respectively. Although the stillbirth rate was determined to be 1.7%, no congenital deformity was noted in infants, and none of the mothers died. The cephalopelvic disproportion rate was 5.9%, and only 2 adolescents experienced abruptio placentae. To reduce the occurrence of adolescent childbearing, pregnancy intentions must be assessed in multiple ways. Information/education may provide benefit to those female adolescents with inconsistent pregnancy intentions.  相似文献   
62.
Journal of Clinical Immunology - NF-κB essential modulator (NEMO, IKK-γ) deficiency is a rare combined immunodeficiency caused by mutations in the IKBKG gene. Conventionally, patients are...  相似文献   
63.
Human chorionic gonadotropin bears structural homology to pituitary thyrotropin. The extremely elevated levels of human chorionic gonadotropin in patients with molar pregnancy or other trophoblastic diseases can lead to hyperthyroidism. We describe a patient with molar pregnancy who had secondary hyperthyroidism prepared rapidly by plasmapheresis for surgery. The clinical picture improved dramatically after the first plasmapheresis. Three subsequent plasmapheresis provided a 75.1% decrease in serum free T3 concentrations and 63.9% free T4 concentrations and recovery after evacuation. This is the first use of plasmapheresis in rapid preparation of a patient who had secondary hyperthyroidism due to molar pregnancy.  相似文献   
64.
Hemophagocytic lymphohistiocytosis (HLH) is a rare lymphoproliferative disorder. HLH may occur as a complication of Epstein-Barr virus (EBV), particularly in patients with immunodeficiencies. Herein, we describe a 16-year-old girl with neurological complications associated EBV-induced HLH. Her cerebral magnetic resonance imaging (MRI) showed contrast-enhanced axial T1-weighted images with enhancement of meningeal surface in the right hemisphere that was consistent with right hemi-meningitis. Hydrocephalus, dilated subdural spaces, delayed myelination, edema, diffuse parenchymal atrophy, calcifications, diffuse/patchy white matter abnormalities have all been previously described with HLH. To the best of our knowledge, this is the first case of hemi-meningitis associated with HLH. We suggest that clinicians should consider HLH with vascular disorders when they determine unilateral meningitis on a brain MRI.  相似文献   
65.
Journal of Clinical Immunology - The aim was to review the compliance, side effects and effectiveness of subcutaneous immunoglobulin (SCIG) supplementation in patients with primary...  相似文献   
66.
67.
68.
Graefe's Archive for Clinical and Experimental Ophthalmology - The aim of this study was to investigate changes in both macular and peripapillary retinal microcirculation in the subclinical...  相似文献   
69.
PURPOSE: The objective of this trial was to investigate the capacity of gated perfusion SPECT (GPS) to detect left ventricular aneurysm (ANV) by comparing QGS and 4D-MSPECT (4DM) algorithms with radionuclide ventriculography (RVG). Secondarily, the comparison of GPS ejection fraction (EF) measurements with those of contrast left ventriculography (LVG) and RVG was aimed. METHODS: Twenty-five patients with ANV confirmed by LVG were studied. The patients underwent RVG and rest Tc-99m-tetrofosmin GPS 1 week after LVG. A 9-segment model was used both in RVG and GPS evaluation. Aneurysm was defined by scoring the wall motion (WM) and phase analysis in RVG; perfusion, wall thickening and WM in GPS. RESULTS: The detection rate of ANV was 96%, 84% and 52% for RVG, QGS and 4DM, respectively. The LVG mean EF (43.52% +/- 16.93%) was significantly higher (P < 0.01) than those of RVG (29.40% +/- 10.90), QGS (30.04% +/- 13.25%) and 4DM (34.92% +/- 13.01%). Moderate to high EF correlation values were obtained between LVG and GPS (r = 0.71-0.79) and GPS-RVG (r = 0.69). There was no significant EF difference between the radionuclide methods except between 4DM-EF and RVG-EF (5.52%, P < 0.05). Wide Bland-Altman limits were observed between the radionuclide methods in EF comparisons (range: 30.5-38.5%). CONCLUSION: GPS seems to have a role in the non-invasive investigation of ANV. QGS-GPS proved to be more reliable (84%) than 4DM-GPS (52%) in the ANV detection. The localization and the extent of the aneurysm itself as well as perfusion and function of adjacent segments may affect aneurysm diagnosis by means of GPS. RVG, QGS-GPS and 4DM-GPS seem not to be interchangeable for routine EF calculation in ANV patients.  相似文献   
70.
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