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   3084篇
  免费   137篇
  国内免费   35篇
耳鼻咽喉   17篇
儿科学   96篇
妇产科学   67篇
基础医学   244篇
口腔科学   66篇
临床医学   216篇
内科学   982篇
皮肤病学   38篇
神经病学   219篇
特种医学   131篇
外科学   581篇
综合类   16篇
一般理论   1篇
预防医学   115篇
眼科学   37篇
药学   143篇
肿瘤学   287篇
  2024年   3篇
  2023年   37篇
  2022年   48篇
  2021年   78篇
  2020年   40篇
  2019年   69篇
  2018年   82篇
  2017年   76篇
  2016年   61篇
  2015年   73篇
  2014年   113篇
  2013年   165篇
  2012年   266篇
  2011年   276篇
  2010年   172篇
  2009年   164篇
  2008年   259篇
  2007年   269篇
  2006年   243篇
  2005年   207篇
  2004年   184篇
  2003年   134篇
  2002年   110篇
  2001年   11篇
  2000年   10篇
  1999年   13篇
  1998年   11篇
  1997年   15篇
  1996年   13篇
  1995年   8篇
  1994年   5篇
  1993年   3篇
  1992年   7篇
  1991年   4篇
  1990年   3篇
  1986年   1篇
  1984年   2篇
  1983年   2篇
  1982年   1篇
  1981年   1篇
  1980年   2篇
  1978年   2篇
  1977年   1篇
  1976年   2篇
  1975年   3篇
  1969年   1篇
  1963年   1篇
  1962年   1篇
  1960年   1篇
  1938年   1篇
排序方式: 共有3256条查询结果,搜索用时 15 毫秒
51.
Background. We investigated the possible association between antichlamydial antibodies and pulse wave analysis (PWA) parameters in a cohort of patients with coronary artery disease (CAD). Methods. The augmentation index (AI), the reflection time index (RTI) and the time to the beginning of the reflected wave (CT-1) were estimated (Sphygmocor ATCOR Medical). IgA titers?≥?40 and IgG ≥80 were considered as positive (microimmunofluorescence test). Patients also underwent coronary angiography, ultrasound carotid measurements and 24 h ambulatory blood pressure (BP) measurements. Results. No differences existed in the traditional risk factors for CAD between the seronegative and seropositive IgA/ IgG groups. IgA seropositive subjects had higher values of AI (p?<?0.01) comparing to seronegatives whilst the levels of CT-1 and RTI were lower (p?<?0.011 and p?<?0.02 respectively). No differences in AI, CT-1 and RTI values were found between IgG seropositive/ seronegatives patients. Conclusions. An association was indicated between IgA antichlamydial titers and PWA parameters in patients with CAD, supporting that the connecting link between arterial stiffness and CAD might include this microorganism.  相似文献   
52.
INTRODUCTIONHerein we present an extremely rare case of a giant extra gastrointestinal stromal tumor (EGIST) of the lesser omentum obscuring the diagnosis of a choloperitoneum.PRESENTATION OF CASEA 79 years old female was admitted to our hospital with symptoms of vomiting and epigastric pain. Abdominal computer tomography revealed a sizable formation that was diagnosed as a tumor of the pancreas. In laparotomy, a choloperitoneum was diagnosed as the cause of patient's symptoms. A tumor adherent firmly to the lesser curvature of stomach was also discovered. Cholecystectomy and subtotal gastrectomy were performed. Histologically, the tumor was diagnosed as a EGIST of the lesser omentum. The patient did not receive any adjuvant therapy and after two years of follow up she is without any recurrence.DISCUSSIONOmental EGISTs may remain clinically silent despite the large tumor's size. It is difficult to differentiate a EGIST in the lesser omentum from a GIST of the lesser curvature of the stomach, despite the use of advanced radiological imaging techniques. Our case of a giant EGIST of lesser omentum obscuring the diagnosis of acute choloperitoneum is the only one reported in literature.CONCLUSIONEGISTs that arise from the omentum are very rare and complete surgical resection is the only effective treatment approach. Adjuvant therapy following resection of localized disease has become standard of care in high risk cases.  相似文献   
53.
54.
55.
A 42-year-old patient presented acutely with bacteremic pneumococcal pneumonia along with metastatic pneumococcal infection of the hip joint. Diagnostic evaluation revealed evidence of a pre-existing bilateral hip osteonecrosis. The osteonecrotic changes were attributed to chronic alcohol abuse and/or an old motor vehicle accident. Appropriate therapy was promptly instituted and the septic arthritis responded well, necessitating hip aspiration only once. A few months later, the patient had no permanent sequelae of the infection.  相似文献   
56.
57.
58.
Lasers in Medical Science - A systematic review and meta-analysis was undertaken to assess the efficacy and safety of intravaginal energy-based therapies (laser and radiofrequency) on sexual health...  相似文献   
59.
Graefe's Archive for Clinical and Experimental Ophthalmology - To investigate the accuracy of preoperative biometry in eyes undergoing combined phacovitrectomy and to compare it with eyes...  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