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   1599950篇
  免费   133651篇
  国内免费   2577篇
耳鼻咽喉   21648篇
儿科学   52961篇
妇产科学   46252篇
基础医学   227922篇
口腔科学   47213篇
临床医学   140878篇
内科学   314704篇
皮肤病学   34150篇
神经病学   130155篇
特种医学   64751篇
外国民族医学   474篇
外科学   243972篇
综合类   39708篇
现状与发展   3篇
一般理论   544篇
预防医学   122865篇
眼科学   36446篇
药学   121296篇
  2篇
中国医学   2981篇
肿瘤学   87253篇
  2018年   14811篇
  2016年   12925篇
  2015年   15054篇
  2014年   20699篇
  2013年   31410篇
  2012年   42621篇
  2011年   44841篇
  2010年   26393篇
  2009年   25354篇
  2008年   43073篇
  2007年   45311篇
  2006年   46114篇
  2005年   44740篇
  2004年   44148篇
  2003年   42230篇
  2002年   41345篇
  2001年   75722篇
  2000年   78380篇
  1999年   66427篇
  1998年   17742篇
  1997年   16341篇
  1996年   16325篇
  1995年   16029篇
  1994年   15076篇
  1993年   14220篇
  1992年   55444篇
  1991年   53801篇
  1990年   52577篇
  1989年   50840篇
  1988年   47229篇
  1987年   46563篇
  1986年   44294篇
  1985年   42850篇
  1984年   32037篇
  1983年   27568篇
  1982年   16148篇
  1981年   14437篇
  1980年   13567篇
  1979年   30466篇
  1978年   21071篇
  1977年   17766篇
  1976年   16698篇
  1975年   17576篇
  1974年   21487篇
  1973年   20673篇
  1972年   18856篇
  1971年   17772篇
  1970年   16291篇
  1969年   15268篇
  1968年   13950篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
96.
97.
98.
99.
Thyroid diseases are common, and use of levothyroxine is increasing worldwide. We investigated the influence of gender, race and socioeconomic status on the diagnosis and treatment of thyroid disorders using data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil), a multicenter cohort study of civil servants (35-74 years of age) from six Brazilian cities. Diagnosis of thyroid dysfunction was by thyrotropin (TSH), and free thyroxine (FT4) if TSH was altered, and the use of specific medications. Multivariate logistic regression models were constructed using overt hyperthyroidism/hypothyroidism and levothyroxine use as dependent variables and sociodemographic characteristics as independent variables. The frequencies of overt hyper- and hypothyroidism were 0.7 and 7.4%, respectively. Using whites as the reference ethnicity, brown, and black race were protective for overt hypothyroidism (OR=0.76, 95%CI=0.64-0.89, and OR=0.53, 95%CI=0.43-0.67, respectively, and black race was associated with overt hyperthyroidism (OR=1.82, 95%CI=1.06-3.11). Frequency of hypothyroidism treatment was higher in women, browns, highly educated participants and those with high net family incomes. After multivariate adjustment, levothyroxine use was associated with female gender (OR=6.06, 95%CI=3.19-11.49) and high net family income (OR=3.23, 95%CI=1.02-10.23). Frequency of hyperthyroidism treatment was higher in older than in younger individuals. Sociodemographic factors strongly influenced the diagnosis and treatment of thyroid disorders, including the use of levothyroxine.  相似文献   
100.
Coronavirus disease 2019 (COVID-19) has resulted in many challenges in patient care, especially among high-risk populations such as heart transplant recipients. Patients with heart transplant experience a significantly higher mortality rate with COVID-19 infection, and management is based on extrapolation from clinical trials done on nontransplant patients and from clinical experience. Here we report 4 cases of patients with heart transplant who presented with COVID-19 infection in late 2020. Patients presented with symptoms similar to those seen in the general population. All 4 patients were admitted to the hospital, and they were all treated with dexamethasone. In addition, 2 patients received remdesivir. Immunosuppressive medications were adjusted to maintain adequate levels of immunosuppression but at the same time allow for an adequate immune response against the infection. All patients were discharged alive from the hospital. We then performed a literature review on studies that included heart transplant patients who developed the infection and developed suggestions for a standardized management approach, which we share in this article.  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