全文获取类型
收费全文 | 7063篇 |
免费 | 404篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 88篇 |
儿科学 | 272篇 |
妇产科学 | 163篇 |
基础医学 | 892篇 |
口腔科学 | 61篇 |
临床医学 | 1226篇 |
内科学 | 1324篇 |
皮肤病学 | 70篇 |
神经病学 | 692篇 |
特种医学 | 92篇 |
外科学 | 574篇 |
综合类 | 88篇 |
一般理论 | 6篇 |
预防医学 | 916篇 |
眼科学 | 106篇 |
药学 | 380篇 |
中国医学 | 11篇 |
肿瘤学 | 518篇 |
出版年
2023年 | 27篇 |
2022年 | 46篇 |
2021年 | 79篇 |
2020年 | 77篇 |
2019年 | 105篇 |
2018年 | 126篇 |
2017年 | 115篇 |
2016年 | 107篇 |
2015年 | 135篇 |
2014年 | 199篇 |
2013年 | 325篇 |
2012年 | 456篇 |
2011年 | 478篇 |
2010年 | 293篇 |
2009年 | 254篇 |
2008年 | 467篇 |
2007年 | 505篇 |
2006年 | 517篇 |
2005年 | 517篇 |
2004年 | 464篇 |
2003年 | 527篇 |
2002年 | 496篇 |
2001年 | 60篇 |
2000年 | 62篇 |
1999年 | 71篇 |
1998年 | 104篇 |
1997年 | 81篇 |
1996年 | 70篇 |
1995年 | 56篇 |
1994年 | 55篇 |
1993年 | 57篇 |
1992年 | 34篇 |
1991年 | 42篇 |
1990年 | 29篇 |
1989年 | 35篇 |
1988年 | 35篇 |
1987年 | 32篇 |
1986年 | 21篇 |
1985年 | 27篇 |
1984年 | 33篇 |
1983年 | 33篇 |
1982年 | 26篇 |
1981年 | 31篇 |
1980年 | 27篇 |
1979年 | 15篇 |
1978年 | 18篇 |
1977年 | 15篇 |
1976年 | 21篇 |
1974年 | 8篇 |
1973年 | 12篇 |
排序方式: 共有7479条查询结果,搜索用时 15 毫秒
101.
Carlos A. Vaz Fragoso MD Daniel P. Beavers PhD John L. Hankinson MD Gail Flynn RCP Kathy Berra MSN Stephen B. Kritchevsky PhD Christine K. Liu MD Mary M. McDermott MD Todd M. Manini PhD W. Jack Rejeski PhD Thomas M. Gill MD Lifestyle Interventions Independence for Elders Study Investigators 《Journal of the American Geriatrics Society》2014,62(4):622-628
102.
Eva Petkova Feihan Lu Joshua Kantrowitz Jamie L. Sanchez Jonathan Lehrfeld Nayla Scaramello Gail Silipo Joanna DiCostanza Marina Ross Zhe Su Daniel C. Javitt Pamela D. Butler 《Comprehensive psychiatry》2014
Schizophrenia patients exhibit impairments in auditory-based social cognition, indicated by deficits in detection of prosody, such as affective prosody and basic pitch perception. However, little is known about the psychometric properties of behavioral tests used to assess these functions. The goal of this paper is to characterize the properties of prosody and pitch perception tasks and to investigate whether they can be shortened. The pitch perception test evaluated is a tone-matching task developed by Javitt and colleagues (J-TMT). The prosody test evaluated is the auditory emotion recognition task developed by Juslin and Laukka (JL-AER). The sample includes 124 schizophrenia patients (SZ) and 131 healthy controls (HC). Properties, including facility and discrimination, of each item were assessed. Effects of item characteristics (e.g., emotion) were also evaluated. Shortened versions of the tests are proposed based on facility, discrimination, and/or ability of item characteristics to discriminate between patients and controls. Test–retest reliability is high for patients and controls for both the original and short forms of the J-TMT and JL-AER. Thus, the original as well as short forms of the J-TMT and JL-AER are suggested for inclusion in clinical trials of social cognitive and perceptual treatments. The development of short forms further increases the utility of these auditory tasks in clinical trials and clinical practice. The large SZ vs. HC differences reported here also highlight the profound nature of auditory deficits and a need for remediation. 相似文献
103.
Physical therapy and orthopedic surgery are important components in the treatment of ankylosing spondylitis (AS). Supervised physical therapy is more effective than individual or unsupervised exercise in improving symptoms, but controlled trials suggest that combined inpatient and outpatient therapy provides the greatest improvement. Recommendations for exercise are universal, but the best types and sequence of therapies are not known. Total hip replacement is the surgery most commonly performed for AS, with good long-term implant survival. Heterotopic ossification may occur no more frequently after hip replacement in patients with AS than in patients with other diseases. Corrective spinal surgery is rarely performed and requires specialized centers and experienced surgeons. 相似文献
104.
105.
Jones G Parry-Jones N Wilkins B Else M Catovsky D;British Committee for Standards in Haematology 《British journal of haematology》2012,156(2):186-195
The British Committee for Standards in Haematology first produced guidelines for the diagnosis and management of hairy cell leukaemia and hairy cell leukaemia variant in 2000. This revision updates those guidelines and covers the areas of diagnosis, treatment and assessment of response to therapy. 相似文献
106.
107.
108.
Sean C. Grondin Colin Schieman Elizabeth Kelly Gail Darling Donna Maziak Moné Palacios Mackay Gary Gelfand 《Canadian journal of surgery》2013,56(4):E75-E81
Background
The purpose of this study is to describe the demographics, training and practice characteristics of physicians performing thoracic surgery across Canada to better assess workforce needs.Methods
We developed a questionnaire using a modified Delphi process to generate questionnaire items. The questionnaire was administered to all Canadian thoracic surgeons via email (n = 102) or mail (n = 35).Results
In all, 97 surgeons completed the survey (71% response rate). The mean age of respondents was 47.7 (standard deviation 9.1) years; 10.3% were older than 60. Ninety respondents (88.7%) were men, 95 (81.1%) practised in English and 93 (76%) were born in Canada. Most (90.4%) had a medical school affiliation, with an equal proportion practising in community or university teaching hospitals. Only 18% of respondents reported working fewer than 60 hours per week, and 34% were on call more than 1 in 3. Three-quarters of work hours were devoted to clinical care, with the remaining time split among research, administration and teaching. Malignant lung disease accounted for 61.2% of practice time, with the remaining time equally split between benign and malignant thoracic diseases. Preoperative testing (49.4%) and insufficient operating time (49.5%) were the most common factors delaying delivery of care. More than 80% of respondents reported being satisfied with their careers, with 62.1% planning on retiring after age 60.Conclusion
This survey characterizes Canadian thoracic surgeons by providing specific demographic, satisfaction and scope of practice information. Despite challenges in obtaining adequate resources for providing timely care, job satisfaction remains high, with a balanced workforce supply and demand anticipated for the foreseeable future. 相似文献109.
Krystallis C Masterton GS Hayes PC Plevris JN 《World journal of gastroenterology : WJG》2012,18(5):401-411
The management of complications in liver disease is often complex and challenging. Endoscopy has undergone a period of rapid expansion with numerous novel and specialized endoscopic modalities that are of increasing value in the investigation and management of the patient with liver disease. In this review, relevant literature search and expert opinions have been used to provide a brief overview and update of the current endoscopic management of patients with liver disease and portal hypertension. The main areas covered are safety of endoscopy in patients with liver disease, the use of standard endoscopy for the treatment of varices and the role of new endoscopic modalities such as endoscopic ultrasound, esophageal capsule, argon plasma coagulation, spyglass and endomicroscopy in the investigation and treatment of liver-related gastrointestinal and biliary pathology. It is clear that the role of the endoscopy in liver disease is well beyond that of just treating varices. As the technology in endoscopy expands, so does the role of the endoscopist in liver disease. 相似文献
110.
Katz AR Komeya AY Soge OO Kiaha MI Lee MV Wasserman GM Maningas EV Whelen AC Kirkcaldy RD Shapiro SJ Bolan GA Holmes KK 《Clinical infectious diseases》2012,54(6):841-843
We report on the first Neisseria gonorrhoeae isolate in the United States identified with high-level resistance to azithromycin. This report discusses the epidemiologic case investigation, the molecular studies of resistance-associated mutations and N. gonorrhoeae multiantigen sequence typing, and challenges posed by emerging gonococcal antimicrobial resistance. 相似文献