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   9267篇
  免费   881篇
  国内免费   85篇
耳鼻咽喉   49篇
儿科学   433篇
妇产科学   193篇
基础医学   1343篇
口腔科学   156篇
临床医学   1005篇
内科学   2321篇
皮肤病学   130篇
神经病学   511篇
特种医学   820篇
外科学   1136篇
综合类   193篇
一般理论   3篇
预防医学   708篇
眼科学   100篇
药学   645篇
  2篇
中国医学   9篇
肿瘤学   476篇
  2021年   113篇
  2020年   75篇
  2019年   127篇
  2018年   139篇
  2017年   105篇
  2016年   103篇
  2015年   149篇
  2014年   201篇
  2013年   265篇
  2012年   372篇
  2011年   366篇
  2010年   276篇
  2009年   250篇
  2008年   380篇
  2007年   397篇
  2006年   388篇
  2005年   356篇
  2004年   315篇
  2003年   307篇
  2002年   356篇
  2001年   361篇
  2000年   310篇
  1999年   246篇
  1998年   219篇
  1997年   240篇
  1996年   221篇
  1995年   178篇
  1994年   177篇
  1993年   155篇
  1992年   185篇
  1991年   200篇
  1990年   174篇
  1989年   206篇
  1988年   196篇
  1987年   209篇
  1986年   194篇
  1985年   177篇
  1984年   131篇
  1983年   87篇
  1982年   93篇
  1981年   86篇
  1980年   70篇
  1979年   77篇
  1978年   85篇
  1977年   86篇
  1976年   89篇
  1975年   73篇
  1974年   84篇
  1973年   69篇
  1972年   52篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified.  相似文献   
4.
5.
PURPOSE: The effectiveness of a point of dispensing (POD) used in a mass dispensing exercise was evaluated. METHODS: Public Health-Seattle & King County (PHSKC), in conjunction with the University of Washington, conducted a functional exercise of mass dispensing plans to test the effectiveness of a POD. Specifically, the organization and maintenance of patient flow, staffing model, signage, and dissemination of public information were evaluated. A data collection application using cellular telephones was used to record time and patient flow data to evaluate patient flow. Questionnaires distributed to staff and volunteer patients at the end of the exercise obtained feedback regarding the setup, organization, and operations of the POD. RESULTS: The POD was operational for approximately 68 minutes. The majority of POD staff reported feeling comfortable with their specific job tasks and duties within 15 minutes of opening the doors to the POD to the public. Staff questionnaires also revealed a high level of self-reported confidence in their ability and in the ability of their colleagues to perform the job-specific responsibilities required of them or respond to this hypothetical event. The majority of volunteer patients found the signs helpful and easy to follow and the check-in form easy to complete. Despite efforts to provide patients with oral and written information about the medications being dispensed, only 80% indicated that they knew how to take the medication, and only 73% reported understanding the medication instructions for all the individuals for whom they picked up medication. CONCLUSION: The majority of volunteer patients and staff who participated in a functional exercise of mass dispensing plans found the POD to be effective. Time-flow analysis provided preliminary estimates of the total amount of time needed to complete the dispensing process for each head of household.  相似文献   
6.
Pain control is one of the most challenging aspects in the management of chronic pancreatitis. Total pancreatectomy can successfully relieve the intractable abdominal pain in these patients but will inevitably result in insulin-dependent diabetes. Islet autotransplantation aims to preserve, as far as possible, the insulin secretory function of the islet cell mass thereby reducing (or even removing) the requirement for exogenous insulin administration after a total pancreactomy. Despite the relatively small number of centres able to perform these procedures, there are important technical variations in the details of their approaches. The aim of this review is to provide details of the current surgical practice for total pancreatectomy combined with islet autotransplantation, and outline the potential advantages and disadvantages of the variations adopted in each centre.  相似文献   
7.
The second documented case of renal aspergilloma due to Aspergillusflavus is presented. The merits of the medical therapy thatfailed are discussed. Pathological examination showed a nidusof aspergillus around suture material persisting from a pyelolithotomyoperation 2 years before in India. We argue that this was thereason for the failure of the medical therapy. This is the firstcase of its kind reported.  相似文献   
8.
9.
This study examined the relationship between risk factors and initiation of alcohol use over a 15-month period among a cohort of 7th graders who were abstainers at the time of initial testing. The relationship between risk factors and alcohol use was examined using a discriminant function analysis. At the univariate level, rejection of parental authority, deviant behavior, and sensation seeking were statistically significant. The discriminant function retained only three of the risk factors: rejection of parental authority, deviant behavior, and religious commitment. Implications for school-based prevention programs are discussed, particularly the need to target primary prevention programs based upon adolescents' risk.  相似文献   
10.
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