全文获取类型
收费全文 | 179882篇 |
免费 | 11536篇 |
国内免费 | 708篇 |
专业分类
耳鼻咽喉 | 2512篇 |
儿科学 | 4915篇 |
妇产科学 | 3460篇 |
基础医学 | 23318篇 |
口腔科学 | 3556篇 |
临床医学 | 17600篇 |
内科学 | 38495篇 |
皮肤病学 | 2806篇 |
神经病学 | 18126篇 |
特种医学 | 6237篇 |
外国民族医学 | 13篇 |
外科学 | 26633篇 |
综合类 | 2379篇 |
现状与发展 | 3篇 |
一般理论 | 202篇 |
预防医学 | 13356篇 |
眼科学 | 4820篇 |
药学 | 11560篇 |
中国医学 | 203篇 |
肿瘤学 | 11932篇 |
出版年
2023年 | 700篇 |
2022年 | 1227篇 |
2021年 | 2866篇 |
2020年 | 1767篇 |
2019年 | 2893篇 |
2018年 | 3405篇 |
2017年 | 2462篇 |
2016年 | 2871篇 |
2015年 | 3463篇 |
2014年 | 5117篇 |
2013年 | 7913篇 |
2012年 | 11424篇 |
2011年 | 12293篇 |
2010年 | 6861篇 |
2009年 | 6325篇 |
2008年 | 11580篇 |
2007年 | 12353篇 |
2006年 | 11846篇 |
2005年 | 12206篇 |
2004年 | 11584篇 |
2003年 | 11057篇 |
2002年 | 10672篇 |
2001年 | 1524篇 |
2000年 | 1159篇 |
1999年 | 1614篇 |
1998年 | 2341篇 |
1997年 | 2027篇 |
1996年 | 1713篇 |
1995年 | 1591篇 |
1994年 | 1426篇 |
1993年 | 1356篇 |
1992年 | 1078篇 |
1991年 | 975篇 |
1990年 | 861篇 |
1989年 | 849篇 |
1988年 | 872篇 |
1987年 | 744篇 |
1986年 | 859篇 |
1985年 | 933篇 |
1984年 | 1246篇 |
1983年 | 1187篇 |
1982年 | 1658篇 |
1981年 | 1525篇 |
1980年 | 1419篇 |
1979年 | 804篇 |
1978年 | 918篇 |
1977年 | 805篇 |
1976年 | 714篇 |
1975年 | 573篇 |
1974年 | 607篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
Joseph D. Westaby Susanna T. E. Cooper Khari A. Edwards Robert H. Anderson Mary N. Sheppard 《Clinical anatomy (New York, N.Y.)》2020,33(3):394-404
Congenital heart disease is a rare but important finding in adults who experience sudden death. Examination of the congenitally malformed heart has historically been considered esoteric and best left to those with expertise. The Cardiac Risk in the Young cardiovascular pathology laboratory based at St George's University of London has now received over 6,000 cases. Of these, 21 congenitally malformed hearts were retained for research and educational purposes. Hearts were assessed using sequential segmental analysis, and causes of death were adjudicated based on thorough macroscopic examination and histology. Congenital malformations that were encountered included atrial septal defects, ventricular septal defects, tetralogy of Fallot, and transposition of the great arteries in both its regular and congenitally corrected variants. Findings also included hearts with mirror-imaged and isomeric atrial appendages. Direct causes of death included myocardial fibrosis, pulmonary hypertension, and hemorrhage. A small but notable proportion did not reveal a substrate for arrhythmia, raising the question of whether the terminal event was due to the congenital heart disease itself, or an underlying channelopathy. Here, we demonstrate the value of simple sequential segmental analysis in describing and categorizing the cases, with the concept of the “morphological method” serving to identify the distinguishing features of the cardiac components. Clin. Anat. 33:394–404, 2020. © 2019 Wiley Periodicals, Inc. 相似文献
33.
34.
Robert Kollmorgen 《Arthroscopy》2019,35(3):824-825
Anatomical understanding of the peritrochanteric space and abductor insertions has been well documented in the literature. Extrapolating this knowledge to perform a “successful” abductor tendon repair has led to controversy over the best method to achieve a durable, stable repair and improve patient outcomes. I feel that the debate in the hip over single- versus double-row fixation is only beginning and we are in for a ride to uncover the best method, as we have with the shoulder over the last 15 years. What is best? Single or double row? 相似文献
35.
Darren R. Feldman MD Yasser Ged MBBS Chung-Han Lee PhD Andrea Knezevic MS Ana M. Molina MD Ying-Bei Chen PhD Joshua Chaim DO Devyn T. Coskey MS Samuel Murray MS Satish K. Tickoo MD Victor E. Reuter MD Sujata Patil PhD Han Xiao MD Jahan Aghalar MD Arlyn J. Apollo MD Maria I. Carlo MD Robert J. Motzer MD Martin H. Voss MD 《Cancer》2020,126(24):5247-5255
36.
37.
38.
Christopher N. Cooley Tyler J. Beranek Matthew A. Warpinski Robert Alexander Amanda O. Esquivel 《The American journal of emergency medicine》2019,37(2):199-203
Introduction
In the United States there has been a large increase in participation in lacrosse for both males and females. The purpose of this study was to analyze the number of head injuries, injury rates (calculated using the reported number of participants) and types of head injuries that are seen in emergency departments in the United States.Methods
We compared injuries between male and female lacrosse participants. This was a retrospective study using a publicly available database produced by the US Consumer Product Safety Commission and information about lacrosse participation from US Lacrosse.Results
A linear regression was performed and showed a positive correlation between number of head injuries to males and time from 2002 to 2010 (R2?=?0.823; p?=?0.001). While the number of injuries to the head in female lacrosse participants was not significant. There was a negative correlation between the number of head injuries to males from 2010 to 2016 (R2?=?0.800; p?=?0.007), but again, there was no significance for female injury count (R2?=?0.417; p?=?0.117). Other significant differences between head injuries in males and females included the mechanism of injury and the type of injury recorded.Conclusion
The most recent data from 2010 to 2016, suggest that both males and females have had a decrease in injury rate. However the total number of female head injuries is not significantly decreasing and as the sport continues to grow there will likely be more total head injuries and visits to the emergency department. 相似文献39.
Oral Everolimus for Treatment of a Giant Left Ventricular Rhabdomyoma in a Neonate—Rapid Tumor Regression Documented by Real Time 3D Echocardiography
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Robert Wagner M.D. Ph.D. Frank Thomas Riede M.D. Hiroshi Seki M.D. Frauke Hornemann M.D. Steffen Syrbe M.D. Ingo Daehnert M.D. Ph.D. Michael Weidenbach M.D. Ph.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(12):1876-1879
The presented case reports on successful treatment with everolimus in a neonate with left ventricular giant rhabdomyoma. The authors used a different dosage regime compared to literature and documented rapid tumor regression by 3D echocardiography. 相似文献
40.
Philippe A. Eigenmann Motohiro Ebisawa Matthew Greenhawt Jonathan O’B Hourihane Tamara T. Perry Benjamin C. Remington Robert A. Wood 《Pediatric allergy and immunology》2021,32(4):658-666
Risk is a concept inherent in every medical procedure. It can be defined as the probability of an adverse event in a defined population over a specified period of time. In the frame of food allergy management, it might be related to a diagnostic procedure, a treatment, or the consumption of foods. The risk of an adverse event can also be augmented by individual factors. This rostrum article discusses various aspects faced by children with food allergies in the light of risk, and their practical implications. Identifying personal risks for severe reaction, such as unstable asthma, and correcting them whenever possible also contribute to a reduction of the risk inherent to food allergy. Among the facets discussed, oral food challenges (OFC) are the most common diagnostic procedures implying an inherent risk. The risk of OFCs can be minimized by correct indication and timing of the test, a safe setting, as well as by ensuring that the patient is otherwise well without potential stressor potentially increasing the risk of a more severe reaction. Oral immunotherapy (OIT) has been studied as a potential treatment for increasing the threshold dose for reaction, and thus reducing the risk of accidental reaction. Nevertheless, the procedure is not devoid of risk as the patients may and do often react during the course of the procedure. Ingestion of trace amounts in processed foods, mainly in community settings such as restaurants, schools, or day care, represents a potential risk of reactions, although for a minority of patients. Precautionary allergen labeling (PAL) is a widespread strategy to reduce the potential risk of reactions due to traces. However, PAL is currently inefficient due to inconsistent labeling, also not indicating a clear maximum amount possibly present in the manufactured food. Finally, cost-effectiveness needs to be considered in risk management, as many risk reduction procedures are clearly not cost-effective. 相似文献