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   3230215篇
  免费   250628篇
  国内免费   7561篇
耳鼻咽喉   45520篇
儿科学   101594篇
妇产科学   86780篇
基础医学   461155篇
口腔科学   92611篇
临床医学   303441篇
内科学   621645篇
皮肤病学   65002篇
神经病学   271276篇
特种医学   125213篇
外国民族医学   1128篇
外科学   472328篇
综合类   76451篇
现状与发展   2篇
一般理论   1362篇
预防医学   270054篇
眼科学   75039篇
药学   241058篇
  10篇
中国医学   6509篇
肿瘤学   170226篇
  2018年   34827篇
  2017年   26618篇
  2016年   29111篇
  2015年   33146篇
  2014年   47124篇
  2013年   72475篇
  2012年   98382篇
  2011年   104080篇
  2010年   61043篇
  2009年   57709篇
  2008年   97548篇
  2007年   103731篇
  2006年   104555篇
  2005年   101538篇
  2004年   97263篇
  2003年   93529篇
  2002年   91707篇
  2001年   144673篇
  2000年   149531篇
  1999年   126486篇
  1998年   37261篇
  1997年   33808篇
  1996年   33258篇
  1995年   32120篇
  1994年   30155篇
  1993年   28267篇
  1992年   102328篇
  1991年   99409篇
  1990年   96275篇
  1989年   92306篇
  1988年   85776篇
  1987年   84337篇
  1986年   80235篇
  1985年   76688篇
  1984年   58300篇
  1983年   49750篇
  1982年   30306篇
  1981年   26978篇
  1979年   54379篇
  1978年   38476篇
  1977年   32163篇
  1976年   30645篇
  1975年   32107篇
  1974年   39458篇
  1973年   37984篇
  1972年   35385篇
  1971年   32838篇
  1970年   30726篇
  1969年   28430篇
  1968年   26290篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates.  相似文献   
72.
73.
74.
75.
In 1963, Goffman argued that forming a group based on shared stigma may provide benefits. However, there is no empirical research on whether perception that a separate, unique, coherent group exists (i.e., group entitativity) influences coping, such as educating others or secrecy, for the stigmatized individual or his or her spouse. Further, little is known about how spouses influence each other in terms of promoting the education of others about a stigmatizing condition, especially when it comes to the role of believing that stigma-based groups, to which they may both belong, exist. This study provides a step toward bridging this gap in the research by applying the label management model in efforts to understand coping for couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). This study included 50 married couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). We found that group entitativity related to those with AATD counterbalanced the influence of genetic stigma on spouses’ intentions to keep the diagnosis secret or to educate others about it. Intrapersonal and interpersonal influences appeared among spouses. Attention is needed on the power of creating groups for stigmatized persons and their relatives. Indeed, people live within a dynamic world of group entities, and multiple social identities including spousal and familial. While attention has been paid to the diffusion of stigmas to loved ones, less has been paid to the uplift of group entities for them.  相似文献   
76.
77.
78.
79.
This study used the National Survey of Ambulatory Surgery (NSAS) database to measure the incidence of and risk factors for symptoms in the ambulatory surgery center and problems within 24 h after isolated carpal tunnel release (CTR). The NSAS contained records on 400,000 adult patients with carpal tunnel syndrome who were treated with CTR in 2006, based on ICD-9 codes. The type of anesthesia used and factors associated with symptoms and problems were sought in bivariate and multivariable statistical analyses. The mean duration of the procedure was 16 ± 8.8 min. Only 5 % were performed under local anesthesia without sedation, 45 % with IV sedation, 28 % regional anesthesia, and 19 % general anesthesia. Symptoms in the ambulatory surgery center or a problem within 24 h after discharge were recorded in 10 % of patients, all of them minor and transient, including difficulties with pain and its treatment. The strongest risk factors were male sex, age of 45 years and older, and participation of an anesthesiologist. Local anesthesia and regional anesthesia were associated with more perioperative symptoms and postoperative problems. Most CTR are performed with some sedation in the United States. CTR is a safe procedure: one in 10 patients will experience a minor issue in the perioperative or immediate postoperative period.  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