首页 | 官方网站   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   1338569篇
  免费   114854篇
  国内免费   6365篇
医药卫生   1459788篇
  2018年   13420篇
  2017年   10680篇
  2016年   12828篇
  2015年   14342篇
  2014年   20008篇
  2013年   29827篇
  2012年   36346篇
  2011年   39015篇
  2010年   24437篇
  2009年   23981篇
  2008年   36481篇
  2007年   38923篇
  2006年   40049篇
  2005年   38654篇
  2004年   36890篇
  2003年   35981篇
  2002年   34016篇
  2001年   66226篇
  2000年   68116篇
  1999年   56759篇
  1998年   16794篇
  1997年   15066篇
  1996年   16059篇
  1995年   16278篇
  1994年   15144篇
  1993年   14184篇
  1992年   47241篇
  1991年   45862篇
  1990年   44083篇
  1989年   41963篇
  1988年   38864篇
  1987年   38185篇
  1986年   35967篇
  1985年   34733篇
  1984年   26411篇
  1983年   22143篇
  1982年   13874篇
  1981年   12462篇
  1980年   11733篇
  1979年   23546篇
  1978年   17043篇
  1977年   14357篇
  1976年   13153篇
  1975年   13717篇
  1974年   16084篇
  1973年   15403篇
  1972年   14186篇
  1971年   13042篇
  1970年   11879篇
  1969年   11109篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
Clinical Rheumatology - Prof. Ari Polachek on of the author of the published version of this article missed to add his second affiliation which is the Department of Rheumatology, Tel Aviv Sourasky...  相似文献   
95.
96.
Hypertrophic lichen planus (HLP) is a T‐cell‐mediated process typically presenting with hypertrophic or verrucous plaques on the lower limbs. We report the case of a 24‐year‐old woman with a history of HLP since age 3 years presenting with rapid malignant transformation of one lesion into a large squamous cell carcinoma (SCC). Subsequent examination revealed progressive, widespread metastatic involvement, and the patient ultimately died from her disease. SCC associated with HLP is rare, with a review of the literature revealing fewer than 50 cases. This case highlights the need to be aware of suspicious changes in HLP and to educate patients as to when to be reevaluated.  相似文献   
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.
Journal of Thrombosis and Thrombolysis - Amniotic fluid embolism (AFE) is a catastrophic condition in the peripartum period and still remains as a leading cause of maternal death. Although over 80%...  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-23

京公网安备 11010802026262号