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   31835篇
  免费   1842篇
  国内免费   811篇
耳鼻咽喉   340篇
儿科学   601篇
妇产科学   939篇
基础医学   747篇
口腔科学   182篇
临床医学   4234篇
内科学   2622篇
皮肤病学   83篇
神经病学   4315篇
特种医学   1158篇
外国民族医学   1篇
外科学   5326篇
综合类   6848篇
现状与发展   1篇
预防医学   1481篇
眼科学   641篇
药学   3015篇
  49篇
中国医学   1205篇
肿瘤学   700篇
  2024年   84篇
  2023年   468篇
  2022年   941篇
  2021年   1264篇
  2020年   1187篇
  2019年   983篇
  2018年   919篇
  2017年   1002篇
  2016年   1186篇
  2015年   1237篇
  2014年   2608篇
  2013年   2220篇
  2012年   2206篇
  2011年   2313篇
  2010年   1969篇
  2009年   1787篇
  2008年   1632篇
  2007年   1614篇
  2006年   1468篇
  2005年   1303篇
  2004年   1012篇
  2003年   838篇
  2002年   712篇
  2001年   579篇
  2000年   441篇
  1999年   392篇
  1998年   262篇
  1997年   248篇
  1996年   140篇
  1995年   186篇
  1994年   160篇
  1993年   125篇
  1992年   116篇
  1991年   100篇
  1990年   74篇
  1989年   70篇
  1988年   75篇
  1987年   68篇
  1986年   78篇
  1985年   90篇
  1984年   61篇
  1983年   39篇
  1982年   48篇
  1981年   55篇
  1980年   41篇
  1979年   18篇
  1978年   24篇
  1977年   12篇
  1976年   17篇
  1975年   6篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
脑卒中偏瘫康复训练程序化研究   总被引:4,自引:0,他引:4  
目的 :观察脑卒中偏瘫患者进行康复训练的疗效。方法 :2 2例脑卒中患者 :康复组 12例 ,对照组 10例。 2组均接受神经科常规药物治疗。康复组按“中风后程序化康复训练表”进行康复训练 ,分别于康复前、康复后 1月和 3月进行疗效评定。结果 :日常生活活动能力量表 (ADL)测评结果显示 :康复组有效率 83 3% (10 / 12 ) ,对照组 30 % (3/10 ) ,2组差别有显著意义 (P <0 0 5 )。神经功能缺损评分结果显示 :康复组有效率 91 7% (11/ 12 ) ,对照组 4 0 % (4 / 10 ) ,2组差别有显著意义 (P <0 0 1)。结论 :康复训练能降低脑卒中偏瘫患者的致残率 ,提高生活质量。  相似文献   
102.
刘芳  赵芳  马立燕  吕菁 《宁夏医学杂志》2004,26(12):786-788
目的 为探讨各种类型新生儿颅内出血的早期诊断方法,明确其临床特点与CT的关系。方法 对176例经CT证实有颅内出血新生儿的临床资料进行回顾性分析。结果 176例患儿中缺氧所致123例(72.6%),产伤21例(11.9%),新生儿出血症22例(12.5%),早产儿10例。患儿有意识障碍者156例(88.6%),惊厥98例(55.68%),肌张力改变113例(64.2%),原始反射减弱或消失104例(59%),贫血16例。CT示:SAH121例。占68.75%,为NICH最常见类型;SDH17例,IPH13例,IVH5例,混合性出血20例。结论 根据临床表现考虑NICH者应做头颅CT或头颅B超检查。Cr是确诊的最佳手段,能正确显示出血部位、范围、程度及区分各种类型,头颅B超对早产儿、低出生体重儿的IVH、IPH检出率高。  相似文献   
103.
简易立体定位仪定位微创治疗高血压脑出血   总被引:2,自引:0,他引:2  
目的 探讨高血压脑出血微创治疗的方法和手术时机的选择对该病疗效的影响。方法 对 12例高血压脑出血患者 ,采用脑内血肿定位仪微创血肿穿刺引流术清除血肿 ,观察疗效。结果 ADL1~ 3级 75 % ,病死率 8.3%。结论 颅内血肿定位仪定位微创血肿穿刺引流术 ,具有效果肯定、定位准确、损伤轻微、适应症广的特点 ,超早期治疗是预后的关键  相似文献   
104.
A 52‐year‐old Japanese woman who presented with gastrointestinal (GI) bleeding underwent a proximal gastrectomy for a gastrointestinal stromal tumor (GIST) with a foveolar hyperplasia at the apex of the tumor, 4.5 cm in size, located in the upper body of the stomach. Although GIST are often asymptomatic and are found only incidentally, clinical symptoms such as bleeding, abdominal pain, or obstruction, occasionally lead to a premorbid diagnosis. When submucosal tumors present GI bleeding, the source of the bleeding usually is an ulceration of the mucosa over the tumor. However, in the present study, it was thought that the bleeding originated from the region of foveolar hyperplasia.  相似文献   
105.
BACKGROUND AND PURPOSE: Dotlike hemosiderin spots ongradient-echo T2(*)-weighted magnetic resonance imaging of the brain have been histologically diagnosed as old microbleeds associated with small vessel disease (SVD). The authors hypothesize that the presence of many dotHSs may be correlated with the fragility of small vessels and the recurrence of SVD, including lacunar infarction and deep intracerebral hemorrhage (ICH). METHODS: To investigate how dotHSs are related to past history of SVD, the number of subcortical or deep dotHSs was investigated in 146 patients with lacunar infarctions (95 men, 51 women, age 38 to 90 [66.6+/-9.4] years). They were divided into 2 subgroups according to history of deep ICHs or lacunar infarctions. The odds ratio (OR) for past history was estimated from logistic regression analyses with the number of subcortical or deep dotHSs as well as other factors. RESULTS: Of 146 patients with lacunar infarctions, 11 had past symptomatic ICHs and 19 had past symptomatic lacunar infarctions. An elevated rate of history of ICH was found for lacunar infarction patients with many deep dotHSs (>or=3; OR, 9.1; 95% confidence interval, 1.6-51, P=.015). However, history of lacunar infarction was not significantly associated with the number of subcortical or deep dotHSs. CONCLUSIONS: Our findings suggest that many deep dotHSs on T2(*)-weighted magnetic resonance imaging may be correlated with deep ICH-lacunar infarction type of SVD recurrence but not lacunar infarction-lacunar infarction type.  相似文献   
106.
OBJECTIVE: To accurately measure blood loss during childbirth in a developing country. METHOD: The alkaline hematin technique was used to quantify blood lost during delivery and 24 h postpartum in 158 women in Pemba Island, Zanzibar. RESULT: Women were found to lose less blood during childbirth and 24 h postpartum than previously reported. Compared with laboratory values, nurse-midwives approximated blood loss accurately (mean difference, i.e., mean underestimation by nurse-midwives, 4.90 mL); however, their imprecision was greater for higher laboratory values. CONCLUSION: This study may prompt further investigation, as no comparable data exist for developing countries where maternal mortality is high and severe anemia prevalent.  相似文献   
107.
目的 探讨脑干出血的CT诊断与预后评估的意义。方法 通过对48例脑干出血病例的临床治疗与CT资料分析,探讨脑干出血的位置、大小、出血量与治疗及预后的关系。结果 脑干平均出血量G=3.3675ml,病死率与出血量有关,出血量小于5ml病死率为35.71%(17.97-53.46%)。早期诊断与治疗是影响预后的关键。结论 CT是目前脑干急性出血快速、准确的检查手段,对其临床治疗及预后评估有重要的价值。  相似文献   
108.
低体重先天性心脏病婴幼儿术后监护体会   总被引:1,自引:0,他引:1  
目的 探讨低体重婴幼儿先天性心脏病的术后监护方法,以提高手术成功率。方法对142例15kg以下的先天性心脏病低体重婴幼儿(3岁以下)术后根据其生理特点,严密做好循环系统、呼吸系统、引流管、感染等监护措施,防止相关并发症的发生。结果 全组术后住院死亡6例,死亡率4.2%;术后并发症15例,发生率为10.6%,包括低心排出量综合征、呼吸衰竭、心律失常、肺部感染、出血等。结论 婴幼儿先天性心脏病术后根据其生理特点进行循环系统、呼吸系统、引流管、感染等监护,可有效降低术后并发症的发生,是提高手术成功率和治愈率的关键。  相似文献   
109.
Neonatal pathology comprises a large array of cerebral lesions due to ischemic and/or hemorrhagic mechanisms. Pathogenesis, neuropathology, clinical settings in the acute stages as well as short and long-term outcome are discussed.  相似文献   
110.
Summary Bronchus stump insufficiency following lung resection, with an average incidence of 4%, is a serious complication which carries a mortality of up to 90%. Operative transthoracic approaches have been largely unsatisfactory because of the high operative risk and rapidly spreading infection. In an experimental study on 18 pigs, endoscopic occlusion of infected bronchus stump fistulae was achieved with fibrin sealant (1 ml, 500 units/ml thrombin, 3500 units/ml aprotinin) applied via a flexible bronchoscope. During autopsy, all bronchus stump fistulae were found to have healed after the second postoperative week. Transitory local abscesses of the pleura could be prevented by high-dose systemic antibiotic therapy for 5 postoperative days but not by antibiotics added to the fibrin sealant. This endoscopic method has already been performed successfully in 3 clinical cases; additional sclerotherapy with (2–3 ml Ethoxysclerol applied around the fistula orifice was carried out before fibrin sealing to stimulate fibrosis. Endoscopic controls demonstrated fistula closure by granulation tissue after 2 weeks. This procedure could become the method of choice for infected postoperative fistulae of the bronchus stump and should be attempted in any case before operative approaches are considered.  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