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   39538篇
  免费   2721篇
  国内免费   126篇
耳鼻咽喉   371篇
儿科学   977篇
妇产科学   938篇
基础医学   5138篇
口腔科学   645篇
临床医学   3820篇
内科学   7634篇
皮肤病学   588篇
神经病学   4159篇
特种医学   1277篇
外科学   6502篇
综合类   469篇
现状与发展   1篇
一般理论   35篇
预防医学   3273篇
眼科学   1011篇
药学   2661篇
中国医学   114篇
肿瘤学   2772篇
  2023年   223篇
  2022年   399篇
  2021年   880篇
  2020年   544篇
  2019年   799篇
  2018年   1013篇
  2017年   725篇
  2016年   722篇
  2015年   855篇
  2014年   1333篇
  2013年   1722篇
  2012年   2801篇
  2011年   2926篇
  2010年   1647篇
  2009年   1485篇
  2008年   2666篇
  2007年   2850篇
  2006年   2678篇
  2005年   2624篇
  2004年   2504篇
  2003年   2367篇
  2002年   2170篇
  2001年   386篇
  2000年   336篇
  1999年   391篇
  1998年   441篇
  1997年   388篇
  1996年   380篇
  1995年   311篇
  1994年   297篇
  1993年   264篇
  1992年   231篇
  1991年   192篇
  1990年   156篇
  1989年   144篇
  1988年   166篇
  1987年   153篇
  1986年   138篇
  1985年   141篇
  1984年   147篇
  1983年   156篇
  1982年   195篇
  1981年   171篇
  1980年   147篇
  1979年   85篇
  1978年   115篇
  1977年   117篇
  1976年   87篇
  1975年   90篇
  1974年   76篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Summary The Southwest Oncology Group (SWOG) studied the response rate and toxicity of merbarone (1,000 mg/m2 IV continuous infusion days 1–5, q 21 days) in patients with advanced metastatic renal cell carcinoma. Among 36 eligible patients, there was one partial response for a response rate of 3% (95% C.I. 0.1–15%). There were no mixed responses. There were no treatment related deaths or adverse drug reactions. Significant anemia, diarrhea, and hypercalcemia were observed. Mild to moderate degrees of malaise/fatigue/lethargy, dizziness/vertigo, hyperglycemia, creatinine increase, nausea, vomiting, weight loss, pedal edema, dyspnea, and granulocytopenia were noted. Merbarone does not have significant activity as a single agent in advanced renal cell carcinoma.  相似文献   
52.
53.
54.
Research investigating predictors of risky sexual behavior of rural MSM is sparse, even though the prevalence of HIV in rural areas has increased. This study explored two sets of predictors of 93 rural MSM's levels of risky sexual behavior: mental health variables and stigma emanating from men's family members, health care professionals, and people in the rural communities in which they live. Over 47% of the men were found to be at modified high to high risk. Logistic regression using a continuation logit model was used to test the relationship of the predictor variables and the four levels of risk. Findings indicate that self-esteem was predictive of the highest sexual risk behavior but not lower levels of risk. Stigma was predictive of modified high sexual risk when compared to low and no risk categories. No variables differentiated men at low risk from men at no risk.  相似文献   
55.
56.
57.
58.
Melorheostosis is a rare sclerosing bone dysplasia that is characterized by a localized, diffuse thickening of the cortical bone. This condition usually affects the appendicular skeleton and associated soft tissue and rarely affects the craniofacial complex. The etiology of this condition is obscure. Diagnosis of melorheostosis relies on clinical, radiographic, and histological correlation. Only 8 cases of melorheostosis involving the craniofacial complex have been reported. We report 2 new cases of isolated melorheostosis involving the maxilla and mandible, together with differential diagnostic considerations. To our knowledge, involvement of the maxilla only has not been previously reported.  相似文献   
59.
Over 3 years, 972 families participated in an after-school asthma program at their child's school. Parents and children attended concurrent 21/2 -hour workshops. Parents were 74% Latino; 45% non-English speaking, with 77% of children on Medicaid. Asthma symptoms were significantly reduced, from multiple times per week to less than once per week on average. Oral steroid use decreased to one third of baseline use. Hospital days decreased from 11% to 2%; emergency visits decreased 35% to 4%; and school days missed decreased 48% to 20%. This program has now become sustainable with both private and Medicaid insurance coverage.  相似文献   
60.
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