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   89374篇
  免费   7149篇
  国内免费   1842篇
耳鼻咽喉   728篇
儿科学   1996篇
妇产科学   1118篇
基础医学   3542篇
口腔科学   4507篇
临床医学   8619篇
内科学   11042篇
皮肤病学   1524篇
神经病学   5223篇
特种医学   3855篇
外国民族医学   22篇
外科学   9259篇
综合类   15710篇
现状与发展   8篇
一般理论   4篇
预防医学   6152篇
眼科学   1507篇
药学   8342篇
  169篇
中国医学   8927篇
肿瘤学   6111篇
  2024年   324篇
  2023年   1492篇
  2022年   2636篇
  2021年   3617篇
  2020年   3915篇
  2019年   3000篇
  2018年   2766篇
  2017年   3067篇
  2016年   3384篇
  2015年   3115篇
  2014年   6021篇
  2013年   8168篇
  2012年   5928篇
  2011年   6266篇
  2010年   5302篇
  2009年   4671篇
  2008年   4104篇
  2007年   4388篇
  2006年   3940篇
  2005年   3382篇
  2004年   2830篇
  2003年   2475篇
  2002年   2097篇
  2001年   1694篇
  2000年   1415篇
  1999年   1120篇
  1998年   926篇
  1997年   825篇
  1996年   673篇
  1995年   588篇
  1994年   540篇
  1993年   465篇
  1992年   375篇
  1991年   335篇
  1990年   246篇
  1989年   250篇
  1988年   225篇
  1987年   214篇
  1986年   196篇
  1985年   245篇
  1984年   195篇
  1983年   131篇
  1982年   171篇
  1981年   135篇
  1980年   121篇
  1979年   111篇
  1978年   62篇
  1977年   58篇
  1976年   46篇
  1975年   28篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
Diagnosis and treatment of thoracic outlet syndrome   总被引:2,自引:0,他引:2  
Patients who develop symptoms of thoracic outlet syndrome (TOS) have a predisposing anatomic abnormality. In most patients with TOS, the symptoms are caused by entrapment of the brachial plexus and they do not arise from compression of the subclavian artery, as was previously thought. The tests advocated for diagnosing this common syndrome (i.e., evaluating the positional compression of the artery when the arms are raised, the neck is turned, or the shoulders are braced) cannot accurately diagnose this syndrome. There are two reasons for this. The symptoms of TOS are not related to the compression of the artery in the outlet in 98% of patients, and 75% of normal individuals without symptoms show diminished radial pulse on various provocation tests. We employed four timed provocation tests (minute tests) to diagnose TOS: the timed Morley test, timed Wright test, timed Eden test, and elevated arm stress exercise, all of which are very sensitive. In normal individuals without symptoms, 20% experience transitional symptoms such as slight pain and tiredness, on these tests indicating a subclinical state. TOS is treated by keeping the thoracic outlet wide, this being done either conservatively or surgically. In 1993 and 1994, we conservatively treated 418 of 422 patients with TOS by means of active exercise, a brace, and by block therapy. These measures did not reduce the symptoms in 23 of these patients, so surgical treatment was indicated. In the remaining 4 of the 422 patients, conservative treatment was not indicated and surgery was performed directly. All the patients showed significant clinical improvement of varying degree. Presented at the 69th Annual Meeting of the Japanese Orthopaedic Association, Tokyo, April 12, 1996  相似文献   
52.
Objective: To study tubal patency and fertility outcome of patients with expectantly managed ectopic pregnancy (EP).

Design: A prospective study.

Setting: Department of Obstetrics and Gynecology, Turku University Central Hospital, Turku, Finland.

Patient(s): Thirty patients who wanted to become pregnant again were treated successfully by expectant management of EP.

Intervention(s): Patients were examined with posttreatment hysterosalpingography, and they filled out a questionnaire about their subsequent pregnancies.

Main Outcome Measure(s): Free passage through open lumen showing tubal patency; number of full-term pregnancies and EPs revealing relative rate of subsequent fertility.

Result(s): A free passage through the diseased tube was seen in 93% of the cases (28 of 30). Two of the 24 patients (8.4%) who wanted to become pregnant had an obstruction in the diseased tube. One (4.2%) of them had a normal opposite tube and later had a normal pregnancy. The other (4.2%) had an obstruction in both tubes and subsequently had a repeat EP. One of the 6 patients had an EP (this patient did not want to become pregnant and did not use contraception). However, her posttreatment hysterosalpingography was normal. In total, the subsequent pregnancy rate was 88% (21 of 24), and the rate of repeat EP was 4.2% (1 of 24).

Conclusion(s): Patients who are treated with expectant management have a good long-term fertility outcome. Spontaneous regression of EP does not lead to increased harm or damage to the tube, i.e., the risk for repeat EP is low.  相似文献   

53.
慢性硬膜下血肿及其发病机制探讨:150例临床分析   总被引:1,自引:0,他引:1  
岳树元  马喜 《天津医药》1993,21(4):212-215
  相似文献   
54.
采用钕钆铝石榴石激光切除白内障囊外摘除术后101例后房人工晶体植入后252例的后囊混浊共353例,激光治疗疗后视力均明显提高,矫正视力>1.0者占82.4%,无1例<0.5。无明显并发症。  相似文献   
55.
56.
Objective:To explore the effect of thrombolysis with anticoagulation treatment forearly stage of deep vein thrombosis of lower extremity.Methods:The clinical data of 10 patients at the early stage of deep vein thrombosis(DVT)in the lower extremuites treated by thrombolysis with anticoagulation and dispersion drugs were analyzed retrospectively.Results:The thrombolytic effect was significant.After treatment,the deep veins were recanalized without regurgitation in 75.3% of the patients.The total effective rate was 100%.Only three patients had hemorrhagic complication,but none of the patients died.Conclusion:Thrombolysis with anticoagulation treatment is an effective and safe method for DVT at the early stage.  相似文献   
57.
BACKGROUND: Patient education is integral part of any diabetes therapy in Germany, but elderly patients are not able to follow the variety of topics comprising standard treatment and teaching programmes (TTP), primarily due to impaired neuropsychological function. This leads to deficits in diabetes knowledge and hindered ability for diabetes self-management. AIM: To evaluate structured TTP for geriatric patients with impaired cognitive function. PATIENTS AND METHODS: A neuropsychological examination was performed on all patients over 54 years [n=102, age 68.6 +/- 8.7 years, diabetes duration 10.3 (0.03-35.4) years, HbA1c 10.3 +/- 1.7% (HPLC, Diamat, NR 4.5-6.3%), cognitive function 87.7 +/- 12.3 IQ points] who took part in TTP for insulin therapy. Patients with impaired cognitive function participated either in the standard TTP of Berger [n = 35, age 67.6 +/- 8.9 years, diabetes duration 9.9 (0.04-35.4) years, HbA1c 10.3 +/- 2.0%] or in the specialized structured geriatric DICOF-TTP [n=33, age 70.4 +/- 8.2 years, diabetes duration 10.4 (0.03-24.9) years, HbA1c 10.7 +/- 1.8%]. RESULTS: After TTP there were no differences in knowledge and ability for diabetes self-management (standard/DICOF: knowledge 11.0 +/- 2.6 vs. 12.2 +/- 2.7 points, P = 0.11; handling 14.9 +/- 3.3 vs. 15.9 +/- 2.5 points, P = 0.18). However, patients who took part in the DICOF programme showed better scores in satisfaction with the education programme [standard/DICOF 44.7 (31-57) vs. 52.5 (45-59) points, P < 0.001]. Six months later the DICOF participants showed better results regarding diabetes self-management (standard/DICOF: handling 12.5 +/- 4.1 vs. 15.9 +/- 3.1 points, P = 0.001). Both groups showed HbA1c decrease (8.3 +/- 1.4 vs. 8.5 +/- 1.3%, P=0.62) and similar incidence of acute complications. CONCLUSIONS: Elderly patients with impaired cognitive function should take part in specialized structured TTP. This leads to both better satisfaction with the education programme and an improved ability for diabetes self-management.  相似文献   
58.
屈光性调节性内斜视综合治疗的效果   总被引:2,自引:2,他引:0  
①目的:探讨综合治疗屈光性调节性内斜视的效果及其相关因素。②方法:对随机收集78例屈光性调节性内斜视病儿的综合治疗效果进行回顾性分析。③结果:经5年随访,73例(93.6%)维持正常眼位,149只(97.4%)弱视眼治愈,72例(92.3%)获得立体视功能。④结论:及时对屈光性调节性内斜视病儿进行综合治疗,建立和恢复其双眼单视功能,预后较好。  相似文献   
59.
A technique for transperineal high-dose-rate (HDR) prostate brachytherapy and needle biopsy in a standard 1.5 T MRI scanner is demonstrated. In each of eight procedures (in four patients with intermediate to high risk localized prostate cancer), four MRI-guided transperineal prostate biopsies were obtained followed by placement of 14-15 hollow transperineal catheters for HDR brachytherapy. Mean needle-placement accuracy was 2.1 mm, 95% of needle-placement errors were less than 4.0 mm, and the maximum needle-placement error was 4.4 mm. In addition to guiding the placement of biopsy needles and brachytherapy catheters, MR images were also used for brachytherapy treatment planning and optimization. Because 1.5 T MR images are directly acquired during the interventional procedure, dependence on deformable registration is reduced and online image quality is maximized.  相似文献   
60.
目的探讨颈椎病的有效防治措施。方法对本院康复医学专科收治的420例颈椎病进行分析。结果本病多在40岁左右发病,起病缓慢,呈反复发作难以彻底治愈。结论颈椎病是中老年多发病.影响着健康和生活质量。发挥医疗卫牛保健网功能,积极采用适官技术,能有效控制病情。恢复生理功能和生活、工作能力。  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