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   1697篇
  免费   88篇
  国内免费   2篇
耳鼻咽喉   10篇
儿科学   78篇
妇产科学   81篇
基础医学   180篇
口腔科学   104篇
临床医学   279篇
内科学   267篇
皮肤病学   18篇
神经病学   131篇
特种医学   17篇
外科学   178篇
综合类   16篇
一般理论   1篇
预防医学   200篇
眼科学   33篇
药学   65篇
肿瘤学   129篇
  2023年   6篇
  2022年   8篇
  2021年   19篇
  2020年   25篇
  2019年   24篇
  2018年   37篇
  2017年   31篇
  2016年   27篇
  2015年   32篇
  2014年   46篇
  2013年   135篇
  2012年   108篇
  2011年   113篇
  2010年   80篇
  2009年   72篇
  2008年   93篇
  2007年   116篇
  2006年   101篇
  2005年   127篇
  2004年   101篇
  2003年   110篇
  2002年   90篇
  2001年   16篇
  2000年   8篇
  1999年   10篇
  1998年   23篇
  1997年   21篇
  1996年   12篇
  1995年   17篇
  1994年   22篇
  1993年   7篇
  1992年   13篇
  1991年   12篇
  1990年   13篇
  1989年   10篇
  1988年   10篇
  1987年   11篇
  1986年   9篇
  1985年   9篇
  1984年   4篇
  1983年   12篇
  1982年   13篇
  1981年   7篇
  1980年   3篇
  1979年   2篇
  1978年   5篇
  1977年   2篇
  1974年   3篇
  1973年   4篇
  1956年   1篇
排序方式: 共有1787条查询结果,搜索用时 0 毫秒
81.
Violence against women is now well recognised as a public health problem and human rights violation of worldwide significance. It is an important risk factor for women's ill health, with far reaching consequences for both their physical and mental health. This glossary aims to describe various forms of interpersonal violence that are directed towards women and girls. Terms and basic concepts used in research and policy on this public health problem will be explained.  相似文献   
82.
Acute rejection episodes still occur after kidney transplantation in spite of modern immunosuppressive protocols including combined tacrolimus, mycophenolate mofetil, and prednisolone. The authors present seven cases of biopsy-proven acute rejection after kidney transplantation refractory to conventional rejection therapy with repeated pulses of high-dose steroids followed by polyclonal or monoclonal antibodies that responded well to photopheresis treatment. Photopheresis is an atoxic immunomodulatory apheresis-based treatment with no generalized immunosuppressive action; rather, it is directed at suppressing donor-specific T-cell clones. At the last follow-up, 9 to 43 months after transplantation, all patients had functioning grafts, with serum creatinine levels ranging from 105 to 312 microM. The authors conclude that photopheresis treatment contributed to the favorable outcome. Therefore, the authors are presently designing a prospective, randomized trial to evaluate the effect of photopheresis as an adjuvant prophylactic treatment after renal transplantation.  相似文献   
83.
OBJECTIVE: We constructed a simple questionnaire that, with a minimum of questions, could accurately and reliably identify women with genital organ prolapse. STUDY DESIGN AND SETTING: Two hundred women with confirmed genital organ prolapse and 199 outpatients with various gynecologic symptoms but no objective prolapse answered 13 questions perceived to be valuable for the diagnosis. With stepwise backward logistic regression, the discriminatory ability of a successively abbreviated set of questions was assessed. The resulting short questionnaire was tested in a new population-based sample of 282 women participating in a screening survey. RESULTS: A final five-item questionnaire retained 94% of the predictive value of all 13 questions and had 92.5% sensitivity and 94.5% specificity in the first group of women. When the questionnaire was used in the subsequent population-based survey, the sensitivity and specificity values were 66.5% and 94.2%, respectively. Most missed cases had stage I prolapse. CONCLUSION: Although the sensitivity of the test was moderate, the specificity, and hence the ability to rule in cases, was satisfactory. The test is suitable for case finding in epidemiologic studies.  相似文献   
84.
85.
86.
Cerebellar dysfunction related to toluene sniffing   总被引:4,自引:0,他引:4  
Only few cases with prolonged cerebellar symptoms after toluene sniffing have previously been reported. We describe here an 18-year-old female who inhaled pure toluene since the age of 12. She developed neurological symptoms with broad-based ataxic gait, incoordination of arms and legs, unsteadiness, dysarthria, downbeat nystagmus, bilateral positive Babinski sign, and poor concentration and abstracting ability. During her 5 weeks in hospital when she did not inhale toluene, her symptoms persisted but decreased and after 8 months had disappeared.  相似文献   
87.
Sixteen pregnancies at risk for Gaucher disease - six with the Norrbottnian form, one with a juvenile form with a similar clinical course to the patients from Norrbotten and nine with the infantile form - have been monitored by the assay of β-glucosidase activity in cultivated amniotic fluid cells with natural labelled glycosylceramide as substrate. Two methods of cultivation were compared in respect of their effect on the activity of lysosomal enzymes. No significant difference was found between the two marker enzymes, β-galactosidase and N -acetyl-β-glucosaminidase, but the β-glucosidase activity was significantly higher in the cells cultivated with one of the methods. In four of the pregnancies at risk, the β-glucosidase activity in the cultivated amniotic fluid cells was less than 5 % of that in the two control materials. These fetuses were regarded as affected with Gaucher disease and were aborted. Differentiation between controls and Gaucher heterozygotes was not possible in cultivated amniotic fluid cells. The diagnosis of Gaucher disease in the amniotic fluid cells was confirmed in three of the four cases by the assay of the β-glucosidase activity in the liver and brain of the aborted fetuses. The glucosylceramide content of the liver from two aborted fetuses was not augmented. The β-glucosidase activity was examined in seven placentas from pregnancies at risk for Gaucher disease and found to be in agreement with that in the cultivated amniotic fluid cells.  相似文献   
88.
Gunilla Brattberg 《Pain》1983,16(3):285-288
Acupuncture therapy for patients suffering from tennis elbow has shown itself to be an excellent alternative to steroid injections. Twenty-one out of 34 patients who were treated with acupuncture became much better-completely free of pain. Many of them had previously been given one or more steroid injections without improvement. In a control group of 26 patients who received only steroid injections, 8 patients reported a corresponding improvement. The ancient Chinese technique adapted to Western conditions has, in the above cases, neither caused any side effects nor worsened the condition of any patient, and is well worth trying as therapy for this disabling complaint.  相似文献   
89.
CONCLUSION: Our results show that average and poor oral hygiene and inadequate dental status are independent risk factors for oral and oropharyngeal squamous cell carcinoma (OOSCC), irrespective of tobacco and alcohol consumption. OBJECTIVE: To evaluate a possible relationship between oral cancer, oral hygiene, dental status, oral mucosal lesions and some lifestyle factors in a population-based case-control study. MATERIAL AND METHODS: Between September 2000 and January 2004, 132/165 (80%) of all incident cases of OOSCC and 320/396 (81%) of the intended eligible matched controls participated in the study. Cases and controls were subjected to an identical oral examination. A standardized protocol specially designed for the study was used. RESULTS: After adjusting for tobacco and alcohol consumption, average oral hygiene (OR 2.0; 95% CI 1.1-3.6) and poor oral hygiene (OR 5.3; 95% CI 2.5-11.3) emerged as significant risk factors for OOSCC. More than 20 lost teeth (OR 3.4; 95% CI 1.4-8.5), >5 defective teeth (OR 3.1; 95% CI 1.2-8.2) and poorly fitting or defective complete dentures (OR 3.8; 95% CI 1.3-11.4) were significant risk factors. Regular dental check-ups were associated with a decreased risk of OOSCC (OR 0.4; 95% CI 0.2-0.6).  相似文献   
90.
Of the 1,575 pregnant women registered at the public Antenatal Health Care Service in the city of Link?ping, Sweden during 1983, an index group of 78 women was identified that met specific well-defined psychosocial risk criteria related to drug addiction, mental insufficiency, and particular social circumstances of possible relevance to problems of pregnancy and early child development. A further 78 pregnant women who did not meet the inclusion criteria were used as a reference group. The present study is a 16-year follow-up in which 43 (57%) of the original index children and 63 (82%) of the original reference children were examined on indices of mental health, and the presence of child abuse. Their mental health was assessed with the Child Behaviour Checklist (CBCL) completed by the mothers and the Youth Self-Report (YSR) completed by the adolescents. The incidence of child abuse and Social Welfare interventions was obtained from Social Welfare records. The index children, especially the boys, displayed significantly poorer mental health as assessed by both CBCL (p<0.05) and YSR (p<0.02). Being an index child increased the odds ratio 16-27 times for different Social Welfare interventions, and child abuse had been investigated in 27% of the index children compared to 1% of the reference children.  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