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   231965篇
  免费   21602篇
  国内免费   14500篇
耳鼻咽喉   2371篇
儿科学   2541篇
妇产科学   2975篇
基础医学   28509篇
口腔科学   4223篇
临床医学   29778篇
内科学   34789篇
皮肤病学   2971篇
神经病学   12422篇
特种医学   8987篇
外国民族医学   116篇
外科学   24020篇
综合类   35197篇
现状与发展   49篇
一般理论   27篇
预防医学   15167篇
眼科学   5958篇
药学   24757篇
  222篇
中国医学   13129篇
肿瘤学   19859篇
  2024年   889篇
  2023年   3709篇
  2022年   9597篇
  2021年   12346篇
  2020年   9195篇
  2019年   7995篇
  2018年   8389篇
  2017年   7659篇
  2016年   7282篇
  2015年   11010篇
  2014年   13284篇
  2013年   12429篇
  2012年   18054篇
  2011年   19449篇
  2010年   12376篇
  2009年   9607篇
  2008年   12764篇
  2007年   12160篇
  2006年   11641篇
  2005年   11183篇
  2004年   7431篇
  2003年   6726篇
  2002年   5575篇
  2001年   4650篇
  2000年   4859篇
  1999年   4918篇
  1998年   2878篇
  1997年   2909篇
  1996年   2236篇
  1995年   2133篇
  1994年   1867篇
  1993年   1111篇
  1992年   1627篇
  1991年   1381篇
  1990年   1155篇
  1989年   1074篇
  1988年   973篇
  1987年   811篇
  1986年   609篇
  1985年   512篇
  1984年   271篇
  1983年   227篇
  1982年   119篇
  1981年   153篇
  1980年   97篇
  1979年   144篇
  1978年   73篇
  1977年   73篇
  1976年   74篇
  1974年   69篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
杨改芳 《护理研究》2006,20(9):811-812
有资料显示,精神病人的自杀死亡率达6.0%[1],有的报道达22.7%[2].精神病病人自杀给家庭、社会带来的诸多问题,以成为精神科临床工作关注的重点.我院2001年-2004年对59例因自杀而入院的精神病病人进行护理干预,取得了满意的效果.现介绍如下.  相似文献   
22.
An OUR-QGD gamma ray stereotactic body radiotherapy system (body knife), made in China, is described. According to its structure and the principle of gamma radiation revolved on a focus, the energy distribution of scattered radiation in its treatment room is calculated. The structural shielding of the wall, roof, and door for a certain treatment room is calculated according to the local radiation protection law.  相似文献   
23.
妊娠期糖尿病62例临床分析   总被引:1,自引:0,他引:1  
目的 探讨妊娠期糖尿病的合理处理及预后.方法 选择62例妊娠期糖尿病患者进行回顾性分析.结果 妊娠期糖尿病62例,其中单纯饮食控制17例,饮食控制 胰岛素治疗43例,2例未治疗.剖宫产42例,阴道产20例.合并妊高症3例,羊水过多2例,羊水过少4例,羊水栓塞1例,早产5例,高胆红素血症3例,真性红细胞增多症2例,死胎2例,新生儿窒息4例,新生儿畸形1例.结论 对妊娠合并糖尿病的孕妇进行早期的诊断及治疗,选择合适的时间及方式终止妊娠可以减少母儿并发症的发生率.  相似文献   
24.
逍遥散出自《太平惠民和剂局方》,由当归、白芍药、柴胡、茯苓、白术、炙甘草、薄荷、煨姜组成。经前期综合征为临床常见的妇科病症,笔者近年来采用逍遥散加减治疗经前期综合征69例,疗效满意,现报道如下。  相似文献   
25.
跻身红尘     
一袭蓑衣,一根鱼竿,临岸静坐。庄子参破世间万物.宁愿静守一泓静水.坐看风云变幻. 一垄田.一把犁.茅屋菊花。陶渊明脱离浊淖,采菊东篱得见南山.行于世俗之外。  相似文献   
26.
AIMS: To establish all-cause and cause-specific death rates, and risk factors for mortality in insulin-treated diabetic individuals living in the province of Canterbury, New Zealand. METHODS: Insulin-treated diabetic subjects (n = 995) on the Canterbury Diabetes Registry were followed up over 15 years and vital status determined. Death rates were standardized and hazard regression was used to model the effects of demographic covariates on relative survival time. RESULTS: There were 419 deaths in 11 226.3 person-years of follow-up with a standardized mortality ratio (SMR) of 2.0 (95% confidence interval (CI) 1.8-2.2). Relative mortality was greatest for the group aged 0-29 years (SMR 3.0 (95% CI 2.4-3.7)). After controlling for diabetes duration and gender, a 10-year increment in age of onset was associated with a 33% decrease in relative hazard (95% CI 29-36%), indicating that excess mortality due to diabetes declines with rising age of onset. After controlling for age of onset and gender, each 10-year increment in duration of diabetes is associated with a 26% decrease in relative hazard (95% CI 24-29%), indicating that with longer survival the mortality hazard approaches the general population hazard. Relative mortalities were increased for cardiovascular, renal and respiratory disease, but not malignancy. Relative mortality from acute metabolic complications was increased in the subgroup with age of onset of diabetes < 30 years and requiring insulin within 1 year of diagnosis. CONCLUSIONS: Mortality rates are high for insulin-treated diabetic individuals relative to the general population.  相似文献   
27.
28.
Legionella pneumophila is a common cause of sporadic community-acquired pneumonia, but culture-proven legionellosis is rarely diagnosed. There is no laboratory test for Legionnaires' disease that can detect all patients with the disease. Culture is the standard diagnostic method and should be initiated as soon as possible in suspected cases. We describe a rare case of community-acquired pneumonia caused by L. pneumophila serogroup 6. A 77-year-old man was admitted to a tertiary care hospital because of high fever, productive cough, and progressive dyspnea. Chest radiography showed bilateral pneumonia, which led to respiratory failure necessitating mechanical ventilatory support. Despite antibiotic therapy, his condition continued to deteriorate and acute renal failure also developed. Urine was negative for L. pneumophila. Culture of the sputum yielded L. pneumophila serogroup 6, although there was no elevation of the serum antibody titer. Pneumonia resolved gradually and he was extubated after treatment with levofloxacin followed by erythromycin. L. pneumophila other than serogroup 1 should be included in the differential diagnosis of patients with suspected atypical community-acquired pneumonia.  相似文献   
29.
30.
Coronary flow reserve (CFR) has been used toassess coronary microcirculation and epicardial coro-nary stenoses[1— 3 ] . CFR is defined as the ratio ofcoronary flow under maximal coronary vasodilatationto coronary flow under resting conditions[4 ] .Whenthe cross- sectional area of epicardial coronary arteriesis constant,coronary flow velocity (CFV) ratios areequal to volume flow ratios.The most common method used clinically formeasuring CFVR is intracoronary Doppler flow(ICD) analysis re…  相似文献   
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