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   33631篇
  免费   861篇
  国内免费   2905篇
耳鼻咽喉   185篇
儿科学   148篇
妇产科学   106篇
基础医学   1233篇
口腔科学   363篇
临床医学   1241篇
内科学   2258篇
皮肤病学   205篇
神经病学   678篇
特种医学   4803篇
外国民族医学   222篇
外科学   2285篇
综合类   17186篇
现状与发展   23篇
一般理论   1篇
预防医学   1345篇
眼科学   1883篇
药学   1381篇
  19篇
中国医学   639篇
肿瘤学   1193篇
  2023年   277篇
  2022年   385篇
  2021年   220篇
  2020年   108篇
  2019年   578篇
  2018年   712篇
  2017年   265篇
  2016年   318篇
  2015年   413篇
  2014年   1175篇
  2013年   515篇
  2012年   1131篇
  2011年   1076篇
  2010年   384篇
  2009年   486篇
  2008年   758篇
  2007年   1097篇
  2006年   6118篇
  2005年   6837篇
  2004年   821篇
  2003年   1281篇
  2002年   920篇
  2001年   1262篇
  2000年   803篇
  1999年   499篇
  1998年   303篇
  1997年   235篇
  1996年   157篇
  1995年   405篇
  1994年   177篇
  1993年   284篇
  1992年   255篇
  1991年   320篇
  1990年   289篇
  1989年   550篇
  1988年   518篇
  1987年   568篇
  1986年   424篇
  1985年   544篇
  1984年   513篇
  1983年   437篇
  1982年   334篇
  1981年   307篇
  1980年   202篇
  1963年   113篇
  1959年   158篇
  1958年   235篇
  1957年   224篇
  1956年   128篇
  1955年   164篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Traditional Persian medicine (TPM) proposes a different viewpoint to the chronic diseases. Diagnosis and implemented treatment are based on individual differences among patients. Constipation or Ea''teghal-e-batn is a condition in which the patient develops difficult or painful defecation. Based on TPM concepts, the first digestion step starts from halq (oral cavity), and ends via defecation from the maq''ad (anus). Avicenna believed that four faculties, ha''zemeh (digestive), ja''zebeh (absorptive), ma''sekeh (retentive) and da''fe''eh (propulsive), are involved in the process of digestion and absorption of the ingested food and expelling the waste materials. The bowel movement and appearance of the stool is a measure for evaluating the gastrointestinal healthy function. Defecation should be with no pain and fecal material should have no burning and acuity. Low food intake or foods with dry temperament, dryness of gastrointestinal tract, diaphoresis and heavy exercise as well as intestine sensory loss were discussed as main causes of constipation. Management of constipation in TPM includes dietary schemes, oil massages and subsequently simple herbal medicines. According to TPM theories, the first step in treating a disease is the elimination of disease causes (asbab e-maraz) and also providing the causes of health (asbab-e-sehhat). Health care providers should know the proper condition which the herbal medicines should be administered in and be able to guide the patients about the benefits and hazards of herbal remedies, commonly used in their living origin.  相似文献   
992.
This is a prospective interventional clinical study evaluating intraocular inflammation developed after Ultrasound Cyclo Plasty (UCP) for the treatment of glaucoma. Eighteen eyes of 18 patients were treated with UCP second-generation probes (Eye OP1). After treatment, the mean intraocular pressure (IOP) significantly decreased from 26.8±7.2 to 18.8±6.1 mm Hg at day 1 and to 14.7±3.4 mm Hg at month 6 (all P<0.001). Mean laser flare-cell photometry value steeply increased after surgery from 12.1±7.5 to 64.1±53.9 ph/ms (P=0.001) at day 1, and then progressively decreased to respectively 60.6±49.7 at day 7, 43.5±38.5 at day 14 and 28.2±18.3 at month 1 (all P<0.05), returning at levels similar to baseline ones at month 3 and month 6 (respectively 16.7±6.2 and 12.8±10.2, both P>0.05). A significant negative correlation was found between postoperative increase of aqueous flare values and anterior chamber depth (R=-0.568, P=0.014). This timeframe may be considered reasonable for repeating UCP treatment, when required.  相似文献   
993.
目的 评价专业人员-父母-住院早产儿三元整合教育方案(三元整合教育方案)在超低出生体重早产儿(ELBW)中的临床应用效果。方法 选取复旦大学附属儿科医院2个年度ELBW的连续样本,对照组常规护理教育方案,实验组三元整合教育方案,采用贝克焦虑量表 (BAI)和贝克抑郁量表第2版(BDI-Ⅱ)作为评价焦虑和抑郁的工具,比较不同教育方案父母的焦虑、抑郁程度的差别和父母入院时和出院前焦虑、抑郁水平。结果 实验组79对父母、对照组64对父母进入本文分析。实验组ELBW平均孕周小于对照组,试管婴儿比例高于对照组,机械通气时间长于对照组,但住院时间并不长于对照组,母乳喂养率也较对照组明显增高,差异均有统计学意义。入院时实验组和对照组BAI粗分[(18.9±9.8)vs (17.1±10.2)]和BDI-Ⅱ评分[(17.2±8.8)vs (16.0±9.0)],中重度焦虑[(37/128) vs (36/158)]和中重度抑郁的例数[(38/128) vs (51/158)],差异均无统计学意义;实验组和对照组出院时较入院时BAI粗分下降了(11.0±6.5)分和(8.5±2.3)分,BDI-Ⅱ评分下降了(11.3±8.1)分和(9.1±7.9)分,中重度焦虑和中重度抑郁的例数均有明显下降,差异均有统计学意义;实验组焦虑和抑郁评分改善值好于对照组,差异有统计学意义。入院时父亲焦虑和抑郁评分均较高于母亲,差异均有统计学意义。结论 三元整合教育方案明显降低了ELBW父母焦虑、抑郁的水平,在单中心的历史对照研究中得到较好的验证。  相似文献   
994.
Overexpression of human epidermal growth factor receptor 2 (HER2) occurs in approximately 15%–20%of breast cancer cases.HER2 is a member of the epidermal growth factor receptor (EGFR) family with tyrosinase kinase activity,and its overexpression is linked to poor prognosis and shorter progression-free survival (PFS) and overall survival(OS).Among various treatment options,HER2-targeting monoclonal antibodies and tyrosine kinase inhibitors(TKIs) have mostly been applied in recent decades to treat...  相似文献   
995.
尽管卒中的预防、诊断、治疗和康复已取得一些进展,但卒中在美国仍然是第三大死亡原因和长期残疾的主要原因.每年约有70万人新发或复发卒中[1].在过去10年里,急性卒中诊治的一些进展,包括纤溶和其他短期疗法的引入,突出显示了急诊医疗服务(emergency medical services,EMS)机构和急诊医疗服务体系(emergency medical services systems,EMSS)在优化卒中医疗中的关键作用[2-7].  相似文献   
996.
Smoking should be stopped and hypertension, diabetes mellitus, dyslipidemia, and hypothyroidism be treated in elderly patients with peripheral arterial disease (PAD). Statins reduce the incidence of intermittent claudication and improve exercise duration until the onset of intermittent claudication in persons with PAD and hypercholesterolemia. Antiplatelet drugs such as aspirin or clopidogrel, especially clopidogrel, angiotensin-converting enzyme inhibitors, and statins should be given to all persons with PAD. Beta blockers should be given if coronary artery disease is present. Exercise rehabilitation programs and cilostazol lengthen exercise time until intermittent claudication develops. Chelation therapy should be avoided.  相似文献   
997.
To describe the successful endovascular treatment in a nonagenarian with symptomatic internal carotid artery stenosis using direct carotid artery access. An independent 98 year-old man was admitted to our hospital for symptoms of progressive weakness with disorientation and dysphasia. Carotid Duplex ultrasonography was performed which revealed a totally occluded right internal carotid artery and high grade stenosis of the left internal carotid artery by velocities of 608/240 cm/sec. The patient refused surgical endarterectomy and thus he was referred for carotid artery stenting. Using the femoral artery approach and multiple catheter techniques, access to the common carotid artery could not be accomplished safely. The procedure was aborted and he was therefore brought back to the catheterization laboratory the following day for direct carotid access. Carotid artery stenting was accomplished by using of a 6F sheath percutaneously in the left common carotid, cerebral protection device (CPD) and a Nitinol stent. The patient was discharged the following day without complications. At 14 months follow-up the patient is functional and independent without recurrence of symptoms. Carotid artery stenting via direct access can be accomplished in patients when the femoral artery approach is anatomically prohibitive. In this case of advanced age and the patient‘s refusal for surgery, direct carotid access was his only option.  相似文献   
998.
Hypertension is a common clinical problem in the elderly worldwide and physicians of all types are likely to encounter patients with hypertensive urgencies and emergencies in these patients. Although various terms have been applied to these conditions, they are all characterized by acute elevations in blood pressure and evidence of end-organ injury. Prompt, but carefully considered therapy is necessary to limit morbidity and mortality. A wide range of pharmacologic alternatives are available to the practitioner to control blood pressure and treat complications in these patients. The management of the elderly patient with hypertensive crises needs to include close monitoring and a gentle decline in blood pressure to avoid catastrophic complications, exacerbation of ischemic myopathy, and vascular insufficiency.  相似文献   
999.
针刺穴位与非穴位激活不同脑区的效应观察   总被引:8,自引:6,他引:8  
目的:观察穴区与非穴区对大脑功能区影响的差异,以探讨相关的针刺理论基础。方法:以视力正常的健康志愿者18人作为受试对象,随机分为A、B组。两组先分别接受针刺假穴治疗,然后A组针刺穴位光明和太冲,B组针刺穴位丰隆和陷谷。所有成像技术均采用1.5T磁共振扫描仪(西门子Erlangen)。结果:在试验中,丘脑及红核的激活、大脑外侧沟与顶颞皮质的激活证明了针刺真穴位与假穴位在激活类型上有显著差异。结论:通过针刺与视觉有关的穴位发现针刺对于视皮质并没有确切的影响,但对其他皮质区,如脑岛、外侧沟、顶颞皮质等与疼痛及躯体感觉刺激有关的皮质有激活作用。  相似文献   
1000.
五味清浊散乙醇提取物镇痛镇静作用研究   总被引:1,自引:0,他引:1  
目的:研究五味清浊散乙醇提取物(WWQZSAE)的镇痛、镇静作用。方法:采用小鼠热板刺激法、光热尾痛法、醋酸扭体法进行镇痛作用研究;采用小鼠自主活动计数法观察镇静作用。结果:WWQZSAE ig能提高热板法和光热尾痛法试验小鼠痛阈值;减少由醋酸引起的试验小鼠扭体反应次数;能明显减少小鼠自主活动次数。结论:WWQZSAE有明显的镇痛镇静作用。  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