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   2030篇
  免费   141篇
  国内免费   3篇
耳鼻咽喉   21篇
儿科学   56篇
妇产科学   50篇
基础医学   235篇
口腔科学   54篇
临床医学   234篇
内科学   412篇
皮肤病学   32篇
神经病学   137篇
特种医学   88篇
外国民族医学   1篇
外科学   268篇
综合类   29篇
一般理论   1篇
预防医学   180篇
眼科学   61篇
药学   118篇
中国医学   3篇
肿瘤学   194篇
  2023年   7篇
  2022年   14篇
  2021年   36篇
  2020年   33篇
  2019年   36篇
  2018年   54篇
  2017年   26篇
  2016年   48篇
  2015年   48篇
  2014年   67篇
  2013年   97篇
  2012年   98篇
  2011年   132篇
  2010年   76篇
  2009年   50篇
  2008年   127篇
  2007年   115篇
  2006年   115篇
  2005年   101篇
  2004年   122篇
  2003年   93篇
  2002年   98篇
  2001年   43篇
  2000年   29篇
  1999年   22篇
  1998年   33篇
  1997年   22篇
  1996年   26篇
  1995年   18篇
  1994年   13篇
  1993年   14篇
  1992年   19篇
  1991年   30篇
  1990年   23篇
  1989年   27篇
  1988年   23篇
  1987年   15篇
  1986年   13篇
  1985年   17篇
  1984年   16篇
  1983年   18篇
  1982年   10篇
  1981年   11篇
  1980年   16篇
  1978年   21篇
  1977年   7篇
  1975年   10篇
  1971年   7篇
  1970年   7篇
  1969年   7篇
排序方式: 共有2174条查询结果,搜索用时 15 毫秒
11.
12.
BACKGROUNDEpstein-Barr virus associated smooth muscle tumor (EBV-SMT) is a rare oncological entity. However, there is an increasing incidence of EBV-SMTs, as the frequency of organ transplantation and immunosuppression grows. EBV-SMT diagnosis relies on histopathology and immunochemical staining to distinguish it from post-transplant lymphoproliferative disorder (PTLD). There is no clear consensus on the treatment of EBV-SMTs. However, surgical resection, chemotherapy, radiation therapy, and immunosuppression reduction have been explored with varying degrees of success. CASE SUMMARYOur case series includes six cases of EBV-SMTs across different age groups, with different treatment modalities, adding to the limited existing literature on this rare tumor. The median latency time between immunosuppression and disease diagnosis is four years. EBV-SMTs present with variable degrees of aggressiveness and seem to have worse clinical outcomes in patients with tumor multiplicity and worse immunocompetency.CONCLUSIONIt is imperative to continue building on this knowledge and keeping EBV-SMTs on the differential in immunocompromised individuals.  相似文献   
13.
Adult degenerative scoliosis affects the growing elderly population and is an expanding challenge for spine surgeons. The etiology and natural history of this disease are imperfectly understood; however, it is accepted that degenerative spinal curvature is likely to progress. Severe deformity, particularly in the sagittal plane, is poorly tolerated. Treatment is complicated in this population where comorbid or mimicking diseases are the norm. Where appropriate, surgery is undertaken only after a thorough assessment of each patient’s spinal geometry. Guidelines aid in selecting among or combining surgical procedures. Increased potential for correction generally involves increased risk. Complications are common after surgery for adult degenerative scoliosis and their management should be anticipated.  相似文献   
14.
15.
16.
INTRODUCTIONPrimary squamous cell carcinoma (SCC) of the tympanic membrane is exceptionally rare. We describe the history, investigation and management of this disease.PRESENTATION OF CASEA 68-year-old woman presented with a three month history of intermittent otorrhoea and external ear canal (EAC) pruritus. Otoscopy revealed a polypoidal granular nodule, confined to the posterior aspect of the tympanic membrane. Examination under anaesthesia (EUA) confirmed that the lesion was confined to the tympanic membrane, with a surrounding rim of normal drum. Biopsies were consistent with well differentiated SCC.DISCUSSIONFollowing discussion at multi-disciplinary team meeting for treatment planning, the patient underwent lateral temporal bone resection with ipsilateral superficial parotidectomy and selective neck dissection. Post-operative histology confirmed an SCC confined to the tympanic membrane.CONCLUSIONSCC of the tympanic membrane is an extremely rare condition. As with early temporal bone SCC, surgical resection with adjacent structure clearance remains the primary treatment modality.  相似文献   
17.
Little normative information is available about the psychosocial functioning of women who have a substance-abusing intimate partner. This study examined whether the social adjustment of women who indicate that they have a substance-abusing partner (n=69) is compromised relative to that of women who indicate that their partner does not abuse substances (n=68). Women with a substance-abusing partner reported compromised social adjustment relative to a comparison sample both overall and in five of six life domains (work, social/leisure, primary relationship, parental, family). Results suggest the potential benefit of expanding the focus of research and treatment to include effects and outcomes for these women and to influence treatment-related policy.  相似文献   
18.
It doesn't take a lot of skill to play racquetball and benefit from the excellent exercise it provides. Most of the injuries can be prevented if safety precautions are observed.  相似文献   
19.
OBJECTIVE: Osteoarthritis (OA) of the knee causes significant morbidity and current medical treatment is limited to symptom relief, while therapies able to slow structural damage remain elusive. This study was undertaken to evaluate the effect of glucosamine and chondroitin sulfate (CS), alone or in combination, as well as celecoxib and placebo on progressive loss of joint space width (JSW) in patients with knee OA. METHODS: A 24-month, double-blind, placebo-controlled study, conducted at 9 sites in the United States as part of the Glucosamine/Chondroitin Arthritis Intervention Trial (GAIT), enrolled 572 patients with knee OA who satisfied radiographic criteria (Kellgren/Lawrence [K/L] grade 2 or grade 3 changes and JSW of at least 2 mm at baseline). Patients with primarily lateral compartment narrowing at any time point were excluded. Patients who had been randomized to 1 of the 5 groups in the GAIT continued to receive glucosamine 500 mg 3 times daily, CS 400 mg 3 times daily, the combination of glucosamine and CS, celecoxib 200 mg daily, or placebo over 24 months. The minimum medial tibiofemoral JSW was measured at baseline, 12 months, and 24 months. The primary outcome measure was the mean change in JSW from baseline. RESULTS: The mean JSW loss at 2 years in knees with OA in the placebo group, adjusted for design and clinical factors, was 0.166 mm. No statistically significant difference in mean JSW loss was observed in any treatment group compared with the placebo group. Treatment effects on K/L grade 2 knees, but not on K/L grade 3 knees, showed a trend toward improvement relative to the placebo group. The power of the study was diminished by the limited sample size, variance of JSW measurement, and a smaller than expected loss in JSW. CONCLUSION: At 2 years, no treatment achieved a predefined threshold of clinically important difference in JSW loss as compared with placebo. However, knees with K/L grade 2 radiographic OA appeared to have the greatest potential for modification by these treatments.  相似文献   
20.
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