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   1380438篇
  免费   118207篇
  国内免费   9147篇
耳鼻咽喉   17215篇
儿科学   43623篇
妇产科学   36994篇
基础医学   187643篇
口腔科学   36850篇
临床医学   126396篇
内科学   283446篇
皮肤病学   32393篇
神经病学   112305篇
特种医学   57152篇
外国民族医学   290篇
外科学   214037篇
综合类   41710篇
现状与发展   10篇
一般理论   415篇
预防医学   110502篇
眼科学   29283篇
药学   99050篇
  59篇
中国医学   4827篇
肿瘤学   73592篇
  2018年   14420篇
  2017年   11913篇
  2016年   13842篇
  2015年   16148篇
  2014年   22452篇
  2013年   32381篇
  2012年   40091篇
  2011年   43220篇
  2010年   27725篇
  2009年   26737篇
  2008年   39708篇
  2007年   41796篇
  2006年   42837篇
  2005年   40894篇
  2004年   38585篇
  2003年   37530篇
  2002年   35252篇
  2001年   67125篇
  2000年   68745篇
  1999年   57201篇
  1998年   17115篇
  1997年   15394篇
  1996年   16305篇
  1995年   16472篇
  1994年   15339篇
  1993年   14273篇
  1992年   47221篇
  1991年   45853篇
  1990年   44023篇
  1989年   41861篇
  1988年   38811篇
  1987年   38118篇
  1986年   35880篇
  1985年   34658篇
  1984年   26374篇
  1983年   22114篇
  1982年   13850篇
  1981年   12448篇
  1980年   11722篇
  1979年   23546篇
  1978年   17075篇
  1977年   14386篇
  1976年   13182篇
  1975年   13723篇
  1974年   16098篇
  1973年   15398篇
  1972年   14175篇
  1971年   13037篇
  1970年   11881篇
  1969年   11101篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
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   
102.
103.
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   
104.
105.
106.
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   
107.
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   
108.
ABSTRACT

Objective

To investigate primary care physician clinical practice patterns, barriers, and education surrounding pediatric physical activity (PA), and to compare practice patterns by discipline.  相似文献   
109.
110.
Psoriasis is a chronic, inflammatory, immune‐mediated disease. Approximately 30% of patients have disease onset before age 18 years. Psoriasis in children and adolescents may be difficult to control, with subsequent poor quality of life and psychosocial consequences. We describe the case of a 12‐year‐old boy with severe, refractory, chronic plaque psoriasis for 6 years. Various therapeutic regimens including different topical corticosteroids, topical vitamin D analogs, phototherapy, photochemotherapy, systemic therapy with methotrexate, cyclosporin, and combination therapies showed only partial or transient responses with frequent relapses. Because anti‐interleukin‐12/23 agents have been successfully used in adults with psoriasis, ustekinumab was initiated and our patient showed a rapid, excellent, sustained response. No recurrence or flares have been observed after 33 months of follow‐up. This case illustrates that ustekinumab may be an effective and safe therapeutic option in adolescents with psoriasis.  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