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   1214篇
  免费   57篇
  国内免费   11篇
耳鼻咽喉   7篇
儿科学   69篇
妇产科学   18篇
基础医学   84篇
口腔科学   28篇
临床医学   101篇
内科学   271篇
皮肤病学   22篇
神经病学   67篇
特种医学   71篇
外国民族医学   1篇
外科学   205篇
综合类   21篇
一般理论   3篇
预防医学   182篇
眼科学   13篇
药学   52篇
中国医学   6篇
肿瘤学   61篇
  2023年   18篇
  2022年   36篇
  2021年   67篇
  2020年   31篇
  2019年   39篇
  2018年   38篇
  2017年   32篇
  2016年   36篇
  2015年   35篇
  2014年   44篇
  2013年   55篇
  2012年   78篇
  2011年   49篇
  2010年   47篇
  2009年   50篇
  2008年   57篇
  2007年   37篇
  2006年   58篇
  2005年   48篇
  2004年   47篇
  2003年   39篇
  2002年   26篇
  2001年   24篇
  2000年   17篇
  1999年   25篇
  1997年   4篇
  1995年   5篇
  1992年   11篇
  1991年   14篇
  1990年   20篇
  1989年   27篇
  1988年   25篇
  1987年   22篇
  1986年   17篇
  1985年   17篇
  1984年   10篇
  1983年   4篇
  1982年   6篇
  1981年   3篇
  1979年   11篇
  1977年   4篇
  1976年   3篇
  1975年   8篇
  1974年   5篇
  1973年   5篇
  1972年   4篇
  1971年   3篇
  1970年   2篇
  1966年   3篇
  1965年   5篇
排序方式: 共有1282条查询结果,搜索用时 15 毫秒
1.
2.
3.
Midazolam is a recently developed water-soluble benzodiazepine that shares anxiolytic, muscle relaxant, hypnotic and anticonvulsant actions with other members of this class. There are limited studies that midazolam can be used successfully to treat seizures in adults and children. In this study, 0.2 mg/kg intramuscular (IM) midazolam was administered to 11 children (eight boys and three girls), aged 3 days to 4 years (mean age 1.8±1.4 years), with seizures of various types. In all but one child, seizures stopped in 15 s–5 min after injection. No side effects were observed. These results suggest that IM administration of midazolam may be useful in a variety of seizures during childhood, especially in case of intravenous (IV) line problem.  相似文献   
4.
5.
In order to determine the frequency and natural history of benign extracerebral fluid collections, computed tomography reports from a period of 26 months at Oklahoma Children's Memorial Hospital were reviewed (total scans: 3,411). Bilateral frontal extracerebral fluid collections were found in 94 infants under 1 year of age. Eighty-two infants had computed tomography scans as part of the evaluation for macrocrania. Thirteen patients had the typical findings of benign extracerebral fluid collections but otherwise were completely asymptomatic. Longitudinal observation for up to 30 months failed to reveal any changes in neurologic status of these patients. Benign extracerebral fluid collections are a relatively common cause of macrocrania in infants. The presence of these fluid collections is not of immediate concern, providing that clinical evaluations fail to identify either neurologic or developmental abnormalities.  相似文献   
6.
Imaging is central to anatomic pathology. The captured images are used for documentation, archiving, teaching, and publication. The advent of low-cost, consumer-type, high-end digital cameras has provided a convenient, easy-to-use alternative for routine image acquisition. The various applications for digital image acquisition in anatomic pathology include, among others, digitizing conventional photographs, digital gross photography and digital macrophotography, digitizing radiographic images, and digital photomicrography. This article reviews digital image acquisition in the anatomic pathology setting using a consumer-type digital camera. The camera type chosen as an example for the discussion was selected for its popularity and wide use among pathologists and for its potential to function as a sole image input device in all applications combined. Techniques and accessories to further increase the functionality of the camera and help overcome some of the commonly encountered problems in some applications are described.  相似文献   
7.
We studied natural killer (NK) cell activity and numbers in the peripheral blood obtained from patients with Behçet''s disease (BD) in inactive and convalescent stage, and from healthy controls. Ratios of helper/suppressor cells (OKT4/OKT8) were below 1.0 in patients with active stage and were normal in the convalescent stage of BD. A relative increase of OKT8+ cells and at the same time of Leu 7+ cells was obtained in the active and convalescent BD stages. Double marker analysis revealed that the sub-population of cells expressing both the T8+ and the Leu 7+ antigen (T8+/Leu 7+) was increased in patients with active stage, and normal in the convalescent stage. The frequency of cells reactive with Leu 11 monoclonal antibody (active NK cells) was evaluated in patients with BD. Data from peripheral blood showed an increased sub-population of T8+/Leu 7+ double marker cells, and a decreased Leu 11+ cell sub-population in patients with active BD, but the majority of Leu 7+ cells in patients with convalescent stage lacked OKT8 antigen when investigated in a double marker system. A parallel increase of Leu 11+ cells was observed in the convalescent stage. This phenotypic analysis was carried out with the NK in vitro functional evaluation of cell populations from peripheral blood. NK cell activity in the clinically active stage of BD was significantly lower than that of healthy controls and patients in the convalescent stage. The decrease of peripheral blood NK function in patients with active BD may be related to the presence of immature forms of NK cells and/or to the increased percentage of T8+/Leu 7+ cells.  相似文献   
8.
Stature estimation based on hand length and foot length   总被引:1,自引:0,他引:1  
This study was carried out to estimate the relationship between hand length, foot length and stature using multiple linear regression analyses based on a sample of male and female adult Turks residing in Adana. Measurements of hand length, foot length and stature were taken from 155 adult Turks (80 male, 75 female) aged 17-23 years. The participants were students of the Medical Faculty of Cukurova University. A multiple linear regression model was fitted to the observed data. Stature was taken as the response or dependent variable, hand length and foot length were taken as explanatory variables or regressors. All possible (simple and multiple) linear regression models for each of males, females and both genders together were tested for the best model. The multiple linear regression model for both genders together was found to be the best model with the highest values for the coefficients of determination R2 = 0.861 and R2adjusted = 0.859, and multiple correlation coefficient R = 0.928.  相似文献   
9.
10.
Between 1986-1988, 600 vascular cases arising from the Iran-Iraq conflict were dealt with within an 18 month period and 60 cases of popliteal artery and/or venous disruption were encountered presenting at variable times after injury. A policy of management between the forward and base hospital surgical teams was introduced, observing the following broad categorizations: (a) assessment/referral, (b) assessment/fasciotomy/referral, (c) immediate operation/referral for further operation/review/management. Two types of incision were used to enter the popliteal fossa: (a) a medial incision and (b) a sigmoid posterior incision (which we now favor). The results of this strategy of management and operative technique (when compared with our previous experience within the same time frame) suggested an improved outcome. Fifty-four out of 60 cases had a satisfactory operative result with below-knee amputation being required in only four cases and higher amputations in two others. No operative or postoperative deaths occurred. The implementation of this "vetting policy" at the front line appeared to reduce the number of amputations and assisted the clarification of management criteria in assessing limb viability at the forward hospital when a large number of casualties were being received. Operative access using the sigmoid posterior incision was not associated with any complications, offered better exposure than the medial incision and was technically easier for the surgeon to perform.  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