全文获取类型
收费全文 | 36441篇 |
免费 | 3073篇 |
国内免费 | 89篇 |
专业分类
耳鼻咽喉 | 278篇 |
儿科学 | 847篇 |
妇产科学 | 905篇 |
基础医学 | 5309篇 |
口腔科学 | 590篇 |
临床医学 | 3639篇 |
内科学 | 6985篇 |
皮肤病学 | 498篇 |
神经病学 | 3189篇 |
特种医学 | 1141篇 |
外国民族医学 | 3篇 |
外科学 | 5269篇 |
综合类 | 784篇 |
一般理论 | 49篇 |
预防医学 | 3435篇 |
眼科学 | 1094篇 |
药学 | 2824篇 |
中国医学 | 39篇 |
肿瘤学 | 2725篇 |
出版年
2023年 | 224篇 |
2022年 | 316篇 |
2021年 | 727篇 |
2020年 | 458篇 |
2019年 | 778篇 |
2018年 | 778篇 |
2017年 | 597篇 |
2016年 | 699篇 |
2015年 | 810篇 |
2014年 | 1136篇 |
2013年 | 1671篇 |
2012年 | 2340篇 |
2011年 | 2475篇 |
2010年 | 1407篇 |
2009年 | 1285篇 |
2008年 | 2128篇 |
2007年 | 2234篇 |
2006年 | 2327篇 |
2005年 | 2293篇 |
2004年 | 2190篇 |
2003年 | 1924篇 |
2002年 | 1807篇 |
2001年 | 523篇 |
2000年 | 477篇 |
1999年 | 498篇 |
1998年 | 452篇 |
1997年 | 398篇 |
1996年 | 385篇 |
1995年 | 377篇 |
1994年 | 300篇 |
1993年 | 300篇 |
1992年 | 372篇 |
1991年 | 323篇 |
1990年 | 289篇 |
1989年 | 306篇 |
1988年 | 254篇 |
1987年 | 279篇 |
1986年 | 248篇 |
1985年 | 267篇 |
1984年 | 240篇 |
1983年 | 216篇 |
1982年 | 226篇 |
1981年 | 181篇 |
1980年 | 162篇 |
1979年 | 168篇 |
1978年 | 128篇 |
1977年 | 135篇 |
1976年 | 118篇 |
1974年 | 129篇 |
1973年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
Chad G. Ball Andrew W. Kirkpatrick Matthew Smith Robert H. Mulloy Leonard Tse Ian B. Anderson 《European journal of trauma and emergency surgery》2007,33(5):550-552
Abstract We report a case of SMV injury in a critically ill patient. The patient was a 19-year-old woman involved in a motor vehicle
collision. Her injuries included grade II splenic and renal lacerations, devascularized and lacerated right and transverse
colon, a transected transverse mesocolon, a massive shear injury of her abdominal wall, and two partial SMV transections.
At initial damage control laparotomy, the SMV was ligated, the devascularized bowel resected and a temporary abdominal closure
applied. At re-operation, a mesocaval shunt using saphenous vein was employed. The shunt failed and the patient required a
saphenous vein jump graft. Although visceral vascular injuries are rare, ligation of the SMV in a damage control situation
is acceptable. This case study is the first to discuss appropriate treatment when interruption to a patient's collateral visceral
venous drainage limits the surgeon’s ability to ligate. In these situations, bypass shunts may be successful. 相似文献
14.
15.
本刊的审稿专家可使用同一个用户名作为审稿人进行稿件审理和作者投稿。(3)作者投稿请直接登录中华医学会业务巾心下信息管理平台的稿件远程管理系统,点击“作者在线投稿”。投稿成功后,系统自动发送回执邮件。作者可随时点击“在线查稿”,获知该稿件的审稿情况、处理进展、审稿意见、终审结论等;有关稿件处理的相关结果编辑部不再另行纸质通知。 相似文献
16.
Contin Educ Anaesth Crit 相似文献
17.
Philip E Benson C W Ian Douglas Michael V Martin 《American journal of orthodontics and dentofacial orthopedics》2004,126(3):325-330
The objective of this study was to investigate the effect of fluoridated elastomeric ligatures on the microbiology of local dental plaque in vivo. This randomized, prospective, longitudinal, clinical trial had a split-mouth crossover design. The subjects were 30 patients at the beginning of their treatment with fixed orthodontic appliances in the orthodontic departments of the Liverpool and the Sheffield dental hospitals in the United Kingdom. The study consisted of 2 experimental periods of 6 weeks with a washout period between. Fluoridated elastomers were randomly allocated at the first visit to be placed around brackets on tooth numbers 12, 11, 33 or 22, 21, 43. Nonfluoridated elastomers were placed on the contralateral teeth. Standard nonantibacterial fluoridated toothpaste and mouthwash were supplied. After 6 weeks (visit 2), the elastomers were removed, placed in transport media, and plated on agar within 2 hours. Nonfluoridated elastomers were placed on all brackets for 1 visit to allow for a washout period. At visit 3, fluoridated elastomers were placed on the teeth contralateral to those that received them at visit 1. At visit 4, the procedures at visit 2 were repeated. Samples were collected on visits 2 and 4. A logistic regression was performed, with the presence or absence of streptococcal or anaerobic growth as the dependent variable. A mixed-effects analysis of variance was carried out with the percentage of streptococcal or anaerobic bacterial count as the dependent variable. The only significant independent variables were the subject variable (P =<.001) for the percentage of streptococcal and anaerobic bacterial count and the visit variable for the percentage of streptococcal count (P =<.001). The use of fluoridated or nonfluoridated elastomers was not significant for percentage of either streptococcal (P =.288) or anaerobic count (P =.230). Fluoridated elastomers are not effective at reducing local streptococcal or anaerobic bacterial growth after a clinically relevant time in the mouth. 相似文献
18.
Michael Robson Isabelle Côte Ian Abbs Geoffrey Koffman David Goldsmith 《American journal of transplantation》2003,3(3):324-327
Thrombotic microangiopathy is a rare but important finding in the context of organ transplantation. Acute renal insufficiency in the setting of hemolysis and thrombocytopenia, a triad that constitutes 'hemolytic uremic syndrome', can be associated with, or triggered by, conditions such as verocytotoxin-producing Escherichia coli, viral infections, malignant hypertension, scleroderma, allograft rejection, lupus erythematosus, pregnancy, and medications including mitomycin C, calcineurin inhibitors, and oral contraceptives. After renal transplantation, it can occur, as either a de novo episode, or recurrent disease. Calcineurin inhibitors have long been associated with post-transplantation thrombotic microangiopathy. Sirolimus has been used as a primary immunosuppressant in patients transplanted with a history of earlier hemolytic-uremic syndrome, and also as rescue therapy in patients with calcineurin-inhibitor-associated thrombotic microangiopathy. We describe four cases where there was significant thrombotic microangiopathy in the context of contemporaneous or contiguous calcineurin inhibitor and sirolimus usage. As the intrarenal cyclosporin concentration is thought to be significantly elevated when cyclosporin and sirolimus are used together, this may explain these findings, and mandates caution in their co-administration. 相似文献
19.
Andrea Berger Michelle Sadeh Gabriel Tzur I Avinoam Shuper Liora Kornreich Dov Inbar Ian J Cohen Shalom Michowiz Isaac Yaniv Shlomi Constantini Eli Vakil 《Journal of the International Neuropsychological Society》2005,11(4):482-487
Cerebellar involvement in motor and non-motor sequence learning was examined with serial reaction time tasks (SRT). Our sample consisted of 8 children and adolescents who had undergone surgical removal of a benign posterior fossa tumor (PFT) during childhood. None of them had undergone chemotherapy or cranial radiation therapy (CRT). Ages ranged from 1-11 years at surgery and 9-17 years at testing. The children were tested not earlier than 2.5 years after surgery (M = 5.9 years), enabling brain plasticity and recovery of functions. Their performance was compared with a matched control sample. The PFT group was not impaired in the implicit learning of sequences, as reflected in their performance in blocks with a repeated sequence, both before and after a random block. However, in the perceptual task, their performance deteriorated more than that of the control group when a random block was introduced, suggesting that it was more difficult for the patients to respond flexibly or change their response set when encountering changing task demands. These results are in line with another study by our group on task switching with the same patients. 相似文献
20.
This study of interprofessional work relations in a Canadian mental health team examines how nursing deployed different forms of power in order to alter the mental health division of labour, to gain administrative, organizational and content control over its own work, expand its jurisdictional boundaries by expropriating the work of other professionals, and exclude others from encroaching on its old and newly acquired jurisdictions. This is set against the context of nursing's long-standing professional project to consolidate and expand its professional jurisdiction. Using an ethnographic study of a single interprofessional mental health team in a psychiatric hospital in Canada, the paper attempts to understand the politics and paradoxes involved in realizing nursing's professional project and how the politics of professional autonomy and professional dominance are actually conducted through micro-political struggles. The data demonstrates the effects of the political struggles at the organizational and work process levels, particularly in the forms of collaboration that result. Nurses gained substantial autonomy from medical domination and secured practical dominion over the work of non-medical professionals. New forms of interprofessional collaboration were accomplished through both simultaneous and sequential micro-political struggles with psychiatrists and non-medical professionals, and the formation of political alliances and informal agreements. Nursing solidarity at the elite level and substantial effort by the elite nurses and their committed colleagues to mobilize their less enthused members were fundamental to their success. The nurses deployed political (power) strategies and tactics to organize and reorganize themselves and other professionals on multiple levels (politically, organizationally, ideologically, socially and culturally). This study reveals the complexity and robustness of micro-political dynamics in the constitution of professional and collaborative interprofessional work relations. 相似文献