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   4149篇
  免费   190篇
  国内免费   161篇
耳鼻咽喉   78篇
儿科学   53篇
妇产科学   88篇
基础医学   742篇
口腔科学   66篇
临床医学   404篇
内科学   917篇
皮肤病学   75篇
神经病学   243篇
特种医学   291篇
外科学   437篇
综合类   52篇
一般理论   4篇
预防医学   169篇
眼科学   22篇
药学   500篇
中国医学   67篇
肿瘤学   292篇
  2023年   23篇
  2022年   62篇
  2021年   140篇
  2020年   72篇
  2019年   86篇
  2018年   106篇
  2017年   74篇
  2016年   119篇
  2015年   185篇
  2014年   200篇
  2013年   241篇
  2012年   367篇
  2011年   338篇
  2010年   223篇
  2009年   188篇
  2008年   243篇
  2007年   338篇
  2006年   234篇
  2005年   227篇
  2004年   145篇
  2003年   133篇
  2002年   96篇
  2001年   114篇
  2000年   72篇
  1999年   77篇
  1998年   43篇
  1997年   30篇
  1996年   37篇
  1995年   27篇
  1994年   17篇
  1993年   16篇
  1992年   25篇
  1991年   21篇
  1990年   9篇
  1989年   22篇
  1988年   16篇
  1987年   13篇
  1986年   18篇
  1985年   9篇
  1984年   11篇
  1983年   6篇
  1981年   5篇
  1980年   6篇
  1978年   13篇
  1976年   6篇
  1973年   4篇
  1972年   4篇
  1971年   6篇
  1970年   4篇
  1968年   4篇
排序方式: 共有4500条查询结果,搜索用时 31 毫秒
61.
62.
An insufficient future liver remnant(FLR)is associated with post-hepatectomy liver failure.Associating liver partition and portal vein ligation for stage hepatectomy(ALPPS)has been shown to be effective for the induction of rapid FLR hypertrophy so as to improve the resectability in patients with insufficient FLR.We hereby report our experience of this novel approach for a 6-year-old patient with hepatoblastoma.Computed tomography showed a hepatoblastoma measuring12.5 cm×9.9 cm×11.7 cm in the right liver(Couinaud segmentⅣ,ⅤandⅧ).Volumetric assessment of the FLR i.e.,left lateral section was 112.6 mL i.e.,21.2%of the estimated total liver volume.In view of the small-for-size FLR,ALPPS was contemplated.An anterior approach was adopted for the in-situ parenchymal split without mobilisation of the right liver.FLR volumetry on the seventh postoperative day was 160.7 mL,which represented a 46.1%gain in volume,and a FLR/ESLV ratio of 30.2%.A right trisectionectomy was performed on the eighth postoperative day.Postoperative recovery was uneventful.Patient was discharged on day 16 after the first operation.To our knowledge,this was the first report that showed the applicability of ALPPS to a paediatric patient.  相似文献   
63.
64.
Antiretroviral (ARV) drug therapy, given during pregnancy for prevention of mother‐to‐child transmission of human immunodeficiency virus 1 (HIV‐1), induces fetal mitochondrial dysfunction in some children. However, the persistence/reversibility of that dysfunction is unclear. Here we have followed Erythrocebus patas (patas) monkey offspring for up to 3 years of age (similar in development to a 15‐year old human) after exposure of the dams to human‐equivalent in utero ARV exposure protocols. Pregnant patas dams (3–5/exposure group) were given ARV drug combinations that included zidovudine (AZT)/lamivudine (3TC)/abacavir (ABC), or AZT/3TC/nevirapine (NVP), for the last 10 weeks (50%) of gestation. Infants kept for 1 and 3 years also received drug for the first 6 weeks of life. In offpsring at birth, 1 and 3 years of age mitochondrial morphology, examined by electron microscopy (EM), was compromised compared to the unexposed controls. Mitochondrial DNA (mtDNA), measured by hybrid capture chemiluminescence assay (HCCA) was depleted in hearts of patas exposed to AZT/3TC/NVP at all ages (< 0.05), but not in those exposed to AZT/3TC/ABC at any age. Compared to unexposed controls, mitochondrial reserve capacity oxygen consumption rate (OCR by Seahorse) in cultured bone marrow mesenchymal fibroblasts from 3‐year‐old patas offspring was ~50% reduced in AZT/3TC/ABC‐exposed patas (< 0.01), but not in AZT/3TC/NVP‐exposed patas. Overall the data show that 3‐year‐old patas sustain persistent mitochondrial dysfunction as a result of perinatal ARV drug exposure. Environ. Mol. Mutagen. 57:526–534, 2016. © 2016 Wiley Periodicals, Inc.  相似文献   
65.
[This corrects the article on p. 1111 in vol. 26, PMID: 21860566.].  相似文献   
66.
67.
68.
69.
We report a patient with spontaneous rupture of the common bile duct. This is an extremely rare condition which produces free leakage of bile into the peritoneal cavity. There has been no previous report concerning the formation of a large retroperitoneal encapsulation of bile. The preoperative diagnosis in our patient was very difficult and endoscopic retrograde pancreatocholangiography and cystography by ultrasound guidance were helpful.  相似文献   
70.
Rationale:Veno-occlusive disease (VOD) is characterized by painful hepatomegaly, ascites, weight gain, and jaundice with nonthrombotic, fibrous obliteration of the centrilobular hepatic veins. VOD after liver transplantation is a rare complication, with an incidence of approximately 2%; however, it can be life-threatening in severe cases. The precise etiology and mechanism of VOD after liver transplantation remains unclear. Acute cellular rejection, antibody-mediated rejection, and treatment with tacrolimus or azathioprine may be associated with the development of VOD after liver transplantation. Additionally, the optimal treatment of VOD after liver transplantation has not yet been established and focuses on supportive care. Defibrotide is an anti-ischemic and antithrombotic drug with no systemic anticoagulant effects. Moreover, only a few reports have investigated the use of defibrotide for VOD after liver transplantation, which has shown promising results.Patient concerns:A 39-year-old woman with primary biliary cholangitis underwent living-donor liver transplantation at our center. She experienced right upper quadrant pain with increased ascites, pleural effusion, and weight gain on postoperative day 14.Diagnoses:Imaging and pathological tests showed no evidence of rejection or vessel complications. VOD was diagnosed clinically based on the findings of weight gain, ascites, jaundice, and pathological biopsy.Interventions:Defibrotid, 25 mg/kg/day, was administered intravenously for 21 days.Outcomes:She showed complete clinical resolution of the VOD.Lessons:Herein, we report a case of successful defibrotide treatment of VOD after living-donor liver transplantation.  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