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   1301篇
  免费   90篇
  国内免费   12篇
耳鼻咽喉   7篇
儿科学   53篇
妇产科学   23篇
基础医学   161篇
口腔科学   28篇
临床医学   94篇
内科学   329篇
皮肤病学   18篇
神经病学   74篇
特种医学   163篇
外国民族医学   2篇
外科学   159篇
综合类   39篇
一般理论   1篇
预防医学   112篇
眼科学   6篇
药学   72篇
中国医学   6篇
肿瘤学   56篇
  2023年   9篇
  2022年   6篇
  2021年   13篇
  2020年   13篇
  2019年   23篇
  2018年   19篇
  2017年   11篇
  2016年   31篇
  2015年   57篇
  2014年   32篇
  2013年   49篇
  2012年   33篇
  2011年   48篇
  2010年   47篇
  2009年   48篇
  2008年   43篇
  2007年   30篇
  2006年   48篇
  2005年   52篇
  2004年   27篇
  2003年   28篇
  2002年   27篇
  2001年   32篇
  2000年   28篇
  1999年   30篇
  1998年   31篇
  1997年   50篇
  1996年   37篇
  1995年   31篇
  1994年   28篇
  1993年   25篇
  1992年   31篇
  1991年   28篇
  1990年   25篇
  1989年   53篇
  1988年   30篇
  1987年   32篇
  1986年   31篇
  1985年   23篇
  1984年   14篇
  1983年   13篇
  1982年   16篇
  1981年   10篇
  1980年   9篇
  1979年   6篇
  1977年   10篇
  1976年   9篇
  1972年   5篇
  1971年   6篇
  1966年   6篇
排序方式: 共有1403条查询结果,搜索用时 31 毫秒
61.
62.
The communication between tumor stromal and parenchymal cells provides an insight to tumor progression. One of the main elements of the stroma, a major contributor to the extracellular environment of tumors, is carcinoma‐associated fibroblasts. They can originate from either normal fibroblasts in the immediate vicinity of the tumor or from circulating bone marrow–derived mesenchymal stem cells. These myofibroblasts can arise locally from an endothelial–mesenchymal transformation at the invasive edge of the cancer and are physically associated with carcinoma cells, that is, in the development of high‐grade malignancies and poor prognosis. These carcinoma‐associated fibroblasts feed the epithelial tumor cells in a host–parasite relationship establishing its role in head and neck squamous cell carcinoma progression.  相似文献   
63.
目的初步探讨化疗联合HLA不全相合G-PBSC输注(微移植)治疗恶性血液病的临床应用。方法回顾性分析2015-05~2016-12接受微移植治疗的13例恶性血液病患者的临床及随访资料。根据病情,对13例患者行不同的预处理方案化疗后,计划给予微移植3~4次。观察微移植后患者的缓解情况,生存时间,血象恢复时间,急、慢性移植物抗宿主病(GVHD)及其他不良反应发生情况。结果随访至2017-04,中危组8例,其中存活6例,死亡2例;高危组5例,其中存活2例,死亡3例。中位生存期为9个月(4~24个月)。微移植治疗后,中性粒细胞和血小板平均恢复时间分别为8 d(5~14 d)和11 d(6~20 d)。所有患者在微移植过程中均未出现急、慢性GVHD及其他不良反应。结论微移植在供者选择上不受限制,移植后血小板及中性粒细胞恢复较快,且无急、慢性GVHD及其他不良反应发生;微移植在中高危恶性血液病的临床应用尚处于探索阶段,仍需多中心、大样本的临床研究来进一步验证。  相似文献   
64.
目的 研究中药燕滨扶正胶囊治疗肝硬化(代偿期或失代偿期)临床疗效。方法 选择代偿期及失代偿期肝硬化患者41例,随机分为治疗组(21例)及对照组(20例)。治疗组给予燕滨扶正胶囊1500 mg/次,口服,2次/日。对照组给予扶正化瘀胶囊2500 mg/次,3次/日。两组疗程均为48周。两组依据病情给予抗病毒,护肝降酶、对症支持等一般治疗(替比夫定、甘利欣、消炎利胆片、茵栀黄胶囊等),观察两组患者症状、血常规、肝功能、门静脉宽度、腹水、肝脏及脾脏形态。结果 中药燕滨扶正胶囊联合抗病毒药物可使代偿期及失代偿期肝硬化患者门静脉宽度、脾肿大回缩或复常,可使纤维化指标复常或大幅下降且肝脏功能好转或复常。结论 燕滨扶正胶囊可改善肝硬化。  相似文献   
65.
马骁  卡索  刘成  李丹  刘守应  王永成 《中国骨伤》2012,25(4):338-340
目的:探讨前后路联合手术治疗髋臼双柱骨折的效果并分析影响疗效的相关因素。方法:2007年8月至2009年7月收治髋臼双柱骨折患者19例,男13例,女6例;年龄27~52岁,平均39.6岁。高位双柱骨折11例,低位双柱骨折8例,双柱骨折累及骶髂关节1例。受伤至手术时间4~11 d,平均5.8 d。患者均采用前后联合入路手术,重建钢板和螺钉内固定。结果:除1例死亡外本组全部获随访,随访时间12~18个月,平均13.6个月。关节功能根据Harris评分标准,术后功能优9例,良7例,可2例。结论:经前后路联合切开复位内固定治疗髋臼双柱骨折疗效满意。  相似文献   
66.
This study sought to determine if Whites and African-Americans respond similarly to headache treatment administered in 'real-world' headache specialty treatment clinics. Using a naturalistic, longitudinal design, 284 patients receiving treatment for headache disorders completed 30-day daily diaries that assessed headache frequency and severity at pretreatment and 6-month follow-up and also provided data on their headache disability and quality of life at pretreatment and 1-, 2- and 6-month follow-up. Controlling for socioeconomic status and psychiatric comorbidity, hierarchical linear models found that African-Americans and Whites reported significant reductions in headache frequency and disability and improvements in life quality over the 6-month treatment period. African-Americans, unlike Whites, also reported significant decreases in headache severity. Nevertheless, Africans-Americans had significantly more frequent and disabling headaches and lower quality of life after treatment relative to Whites. Although Whites and African Americans responded favourably to headache treatments, more efficacious treatments are needed given the elevated level of headache frequency that remained in both racial groups following treatment.  相似文献   
67.
68.
BACKGROUND: Tumour necrosis factor-alpha (TNF-alpha) is an important regulator of the chronic inflammation contributing to tumour progression. Infliximab, an anti-TNF-alpha monoclonal antibody was investigated in this trial of patients with advanced cancer. The primary objectives were to determine the safety profile and biological response of infliximab in a cancer population. Clinical response was a secondary objective. PATIENTS AND METHODS: Forty-one patients received infliximab at 5 mg/kg (n = 21) or 10 mg/kg (n = 20) i.v. at 0 and 2 weeks and then every 4 weeks. Post-treatment samples were measured for changes in plasma and serum TNF-alpha, CCL2, IL-6 and C-reactive protein (CRP). RESULTS: Infliximab was well tolerated with no dose-limiting toxic effects. At both doses of infliximab, neutralisation of serum TNF-alpha was observed after 1 h while plasma CCL2, IL-6 and serum CRP were decreased 24 and 48 h following infliximab administration. Seven patients experienced disease stablisation (range 10-50+ weeks). There was no evidence of disease acceleration in any patient. CONCLUSIONS: Infliximab treatment was safe and well tolerated in patients with advanced cancer. There was evidence of biological activity with baseline TNF-alpha and CCL2 being correlated with infliximab response.  相似文献   
69.
We report a case of chronic diarrhea due to hypergastrinemia with achlorhydria but without gastritis in a five-year-old boy. Symptoms responded promptly to oral administration of hydrochloric acid and resolved completely after one year of treatment. The pathophysiologic situation in this patient closely resembled that normally seen in neonates, suggesting prolonged but nevertheless transient immaturity of gastric secretions.  相似文献   
70.
Systemic candidiasis with renal involvement is a rare but well-recognized complication during intensive care treatment in very-low-birth-weight infants. We report a term neonate who developed anuria associated with bilateral bezoar formation in the renal pelvis and candidemia. The treatment consisted of placement of a nephrostomy tube in the left kidney, short-term irrigation with amphotericin B and iv, and later, oral administration of fluconazole.  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