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   4114篇
  免费   336篇
  国内免费   9篇
耳鼻咽喉   15篇
儿科学   64篇
妇产科学   44篇
基础医学   188篇
口腔科学   91篇
临床医学   393篇
内科学   596篇
皮肤病学   60篇
神经病学   243篇
特种医学   81篇
外科学   440篇
综合类   632篇
预防医学   1158篇
眼科学   101篇
药学   267篇
中国医学   38篇
肿瘤学   48篇
  2024年   6篇
  2023年   78篇
  2022年   126篇
  2021年   149篇
  2020年   154篇
  2019年   344篇
  2018年   212篇
  2017年   145篇
  2016年   85篇
  2015年   85篇
  2014年   257篇
  2013年   241篇
  2012年   207篇
  2011年   241篇
  2010年   163篇
  2009年   128篇
  2008年   128篇
  2007年   118篇
  2006年   105篇
  2005年   83篇
  2004年   49篇
  2003年   53篇
  2002年   38篇
  2001年   52篇
  2000年   49篇
  1999年   48篇
  1998年   34篇
  1997年   29篇
  1996年   10篇
  1995年   8篇
  1994年   7篇
  1993年   7篇
  1992年   5篇
  1991年   4篇
  1990年   4篇
  1988年   3篇
  1985年   79篇
  1984年   104篇
  1983年   91篇
  1982年   93篇
  1981年   104篇
  1980年   76篇
  1979年   82篇
  1978年   81篇
  1977年   52篇
  1976年   60篇
  1975年   66篇
  1974年   54篇
  1973年   58篇
  1972年   1篇
排序方式: 共有4459条查询结果,搜索用时 31 毫秒
71.
72.
73.
Cardiac hemangioma is rare, even more when leading to a cardiovascular collapse in a seemingly healthy newborn. A 6-day-old neonate had a tamponade caused by a basolateral hemangioma of the left ventricle. Partial surgical resection was performed. A congenital lobular capillary hemangioma was diagnosed upon histologic examination. The patient recovered completely and shows normal development at the 12-month follow-up.  相似文献   
74.
75.
Abstract

This article reports on a study investigating employment-related support to individuals with HIV/AIDS from the perspective of service providers. Surveys were completed by AIDS Service Organizations (ASOs) and Vocational Rehabilitation (VR) administrators and counselors that examined the extent to which support around employment was provided, the type of work-related services delivered, and outreach practices offered to this population. Findings indicated that although employment is becoming an increasingly important concern to this population, service providers have a limited capacity to respond to such needs. Strategies are presented for social workers and other professionals to consider as they work to support individuals with HIV/AIDS with employment-related concerns.  相似文献   
76.
《Substance use & misuse》2013,48(11):1501-1518
“Natural resolutions” highlight how influences on addictive behavior change may differ from and interact with influences on the use of substance-related services. These distinct literatures are summarized and implicate extra-therapeutic environmental variables in both processes. Whether assisted by interventions or not, stable resolutions are surrounded by environmental contexts characterized by improved circumstances across several years that bracket cessation of substance misuse. Psychosocial problems associated with substance use increase help-seeking, and interventions enhance improvements that typically follow initial resolution. Implications for promoting help-seeking and behavior change and necessary revisions in conventional views about relations between the processes are discussed. [Translations are provided in the International Abstracts section of this issue.]  相似文献   
77.
This article is the first in a series of three, dedicated to the history and functions of what is known as a UMD in France: Unités pour Malades Difficiles, or “Units for Difficult Patients”. This particular article focuses on the oldest such secure structure, UMD Henri Colin, created in 1910 in Villejuif as a quartier de sûreté, or a “secure ward”. The article aims to detail evolutions in treatment and the types of patient treated over more than one hundred years, parallel to social change. Four distinct chronological periods are examined, for their perspective on professional practice as much as for the reasons given for patients’ admission and the psychopathological profiles of “dangerous” patients. Clinical vignettes are used to illustrate this historical evolution.  相似文献   
78.
79.

Background

Patients undergoing esophagectomy for cancer usually deal with malnourishment which increases postoperative morbimortality. The objective of this paper is to analyze the nutritional benefits of feeding jejunostomy (FJ) for early postoperative enteral nutrition (EN) and directly-related complications.

Material and methods

Retrospective study of 100 patients undergoing esophagectomy for cancer between 2008 and 2016.

Results

FJ was placed in 47 patients. 82.98% reached EN requirements in FJ group, with a median EN re-start of 1.9 days and median days to objective requirements of 5 days.51.06% developed directly-related FJ complication, 91.66% of them mild ones (gastrointestinal or catheter-related). 2 patients (4.25%) required re-intervention.No significant differences were shown in total protein and albumin seric levels during first postoperative week and in anastomotic leak rate between both groups (p?>?0.05).

Conclusions

Feeding jejunostomies are associated with a great number of complications although most are not life-threatening. Since its nutritional benefit is not proven FJ cannot routinely recommended after esophagectomy. However, the optimal pathway for EN reintroduction, including direct oral intake, is still a matter of debate.  相似文献   
80.
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