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   37170篇
  免费   3262篇
  国内免费   133篇
耳鼻咽喉   439篇
儿科学   1022篇
妇产科学   752篇
基础医学   4493篇
口腔科学   890篇
临床医学   4361篇
内科学   7428篇
皮肤病学   614篇
神经病学   3459篇
特种医学   1147篇
外国民族医学   5篇
外科学   5702篇
综合类   871篇
一般理论   35篇
预防医学   3270篇
眼科学   865篇
药学   2662篇
中国医学   44篇
肿瘤学   2506篇
  2022年   271篇
  2021年   572篇
  2020年   354篇
  2019年   566篇
  2018年   642篇
  2017年   501篇
  2016年   490篇
  2015年   628篇
  2014年   857篇
  2013年   1330篇
  2012年   1900篇
  2011年   1907篇
  2010年   1124篇
  2009年   1044篇
  2008年   1764篇
  2007年   1952篇
  2006年   1951篇
  2005年   1896篇
  2004年   1808篇
  2003年   1707篇
  2002年   1710篇
  2001年   860篇
  2000年   829篇
  1999年   797篇
  1998年   447篇
  1997年   378篇
  1996年   404篇
  1995年   356篇
  1994年   328篇
  1993年   295篇
  1992年   562篇
  1991年   523篇
  1990年   553篇
  1989年   457篇
  1988年   484篇
  1987年   462篇
  1986年   459篇
  1985年   453篇
  1984年   406篇
  1983年   373篇
  1982年   316篇
  1981年   326篇
  1980年   315篇
  1979年   389篇
  1978年   282篇
  1977年   248篇
  1976年   251篇
  1974年   263篇
  1973年   241篇
  1972年   231篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
On-line imaging of prostate markers can be used to compensate for errors in radiation delivery. This study assessed the patient acceptability and morbidity associated with the trans-perineal route of implantation. A minority experienced acute pain or bleeding. Placement was accurate in all but one subject. An operator related learning curve exists. Although this is an invasive procedure most patients found it acceptable. Implementation for routine clinical practice is feasible.  相似文献   
92.
Congenital dyserythropoietic anemia type II is a rare disorder that is often diagnosed in patients before age 20 years. Patients with this disorder, which is also called hereditary erythroblastic multinuclearity associated with a positive acidified serum lysis test, may have symptoms of iron overload. The purpose of this case report is to alert physicians to consider the diagnosis of congenital dyserythropoietic anemia type II in elderly patients who have anemia and iron overload.  相似文献   
93.
94.
The 8th Conference of the British Psychosocial Oncology Group was held in London on 9–10 December 1991 and attracted over 120 participants. The conference was extended from its usual one day format to one and a half days, to allow more time for both a formal and informal exchange of ideas. Eight invited speakers participated, but proferred papers and posters remained an important focus of the meeting. This is the largest annual conference in Britain for professionals working in psychosocial oncology and an important forum for the presentation of research. As in previous years, the conference attracted a number of newcomers, indicating the continued expansion of this field of research. A number of topical issues were presented in keynote papers by invited speakers. New work in cancer prevention and the associated areas of counselling families at risk and ethical issues, formed one symposium. Communication skills and relevant training needs in paediatric and adult oncology were an important theme of the conference and intervention studies formed the third main topic.  相似文献   
95.
A case of emphysematous cholecystitis with gall-bladder perforation, resulting in free intraperitoneal gas, is presented. It adds to only nine previous reports. A successful outcome was achieved by early surgery, combined with appropriate antibiotic therapy.  相似文献   
96.
Four selected cases of emergent IABP insertion in PV patients are presented. After angiographic documentation of critical iliac stenosis, conservative peripheral angioplasty was performed prior to IABP insertion. No patient experienced a peripheral ischemic event associated with IABP use. © 1992 Wiley-Liss, Inc.  相似文献   
97.
Nine years after the beginning of the epidemic of freebase (crack) cocaine abuse in the Bahamas, this historical study was done to characterize the natural course of the epidemic and to estimate the effectiveness of control measures. The authors' data include the incidence of new cases at the only psychiatric hospital in the Bahamas and at the primary community psychiatric clinic in the nation. The Bahamian response included 1) demand reduction, 2) supply reduction, and 3) reduction of money laundering. The annual number of new cases of crack abuse presenting for treatment declined from 1987 to mid-1991 in both facilities, but in 1992 it began rising again in the inpatient setting only. The changes in recent years have been accompanied by an increase in violent crimes against persons, especially robberies. (American Journal on Addictions 1994; 3:14–24)  相似文献   
98.
99.
Summary Prosthetic materials, such as metals, marlex mesh and methyl methacrylate have been used for stabilization of the chest wall after resection of large areas of rib cage. Such materials are contraindicated in an infected area. A new method of providing a stable chest wall using autogenous tissue is presented.  相似文献   
100.
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