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   22017篇
  免费   2128篇
  国内免费   565篇
耳鼻咽喉   135篇
儿科学   555篇
妇产科学   314篇
基础医学   1728篇
口腔科学   109篇
临床医学   2736篇
内科学   4175篇
皮肤病学   141篇
神经病学   3283篇
特种医学   458篇
外国民族医学   6篇
外科学   2172篇
综合类   2631篇
现状与发展   2篇
一般理论   1篇
预防医学   1834篇
眼科学   102篇
药学   1972篇
  43篇
中国医学   1144篇
肿瘤学   1169篇
  2024年   82篇
  2023年   481篇
  2022年   878篇
  2021年   1201篇
  2020年   1156篇
  2019年   1034篇
  2018年   929篇
  2017年   988篇
  2016年   965篇
  2015年   913篇
  2014年   1487篇
  2013年   1924篇
  2012年   1193篇
  2011年   1327篇
  2010年   1064篇
  2009年   970篇
  2008年   1018篇
  2007年   944篇
  2006年   859篇
  2005年   728篇
  2004年   612篇
  2003年   524篇
  2002年   451篇
  2001年   366篇
  2000年   309篇
  1999年   214篇
  1998年   210篇
  1997年   209篇
  1996年   199篇
  1995年   183篇
  1994年   141篇
  1993年   117篇
  1992年   142篇
  1991年   107篇
  1990年   110篇
  1989年   95篇
  1988年   76篇
  1987年   75篇
  1986年   59篇
  1985年   63篇
  1984年   46篇
  1983年   32篇
  1982年   44篇
  1981年   46篇
  1980年   26篇
  1979年   27篇
  1978年   22篇
  1977年   20篇
  1975年   10篇
  1974年   9篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
31.
74例小儿慢性头痛经辨证治疗,显效80.95%,好转16.67%,无效2.38%。痰浊头痛二陈汤或半夏白术天麻汤加减;肾虚头痛,杞菊地黄汤加减;淤血头痛,补阳还五汤;气血虚头痛八珍汤加减。指出了小儿内伤头痛的病因病机,并指出脑电图,脑阻抗血流图、CT、甲皱微循环可做为此病的诊断及疗效指标。  相似文献   
32.
目的:探讨两种剂量的7-甲异炔诺酮(OrgOD14,利维爱)对绝经症状控制的比较。方法:60例绝经后妇女随机分为两组:①A组30例,每日口服7-甲异炔诺酮2.5mg。②B组30例,隔日口服7-甲异炔诺酮2.5mg,共6个月。观察服药前后的Kupperman评分变化及血雌二醇、促卵泡激素水平的改变。结果:两组服药后绝经症状明显改善,Kupperman评分明显降低(P<0.01),雌二醇水平显著上升(P<0.01),促卵泡激素水平明显下降(P<0.05),而两组之间差异无显著性。结论:7-甲异炔诺酮可有效地控制绝经症状,每日口服2.5mg并不比隔日口服2.5mg有较好的控制效果(除控制失眠外),故推荐隔日口服2.5mg7-甲异炔诺酮。  相似文献   
33.
34.
功能性消化不良是一种高发性疾病,常影响着人们的生活质量,被视为重要的消化道疾病.虽然已有达成共识的罗马标准,功能性消化不良呈现出多种多样的症状.本文尝试为临床提供治疗的选择,包括幽门螺杆菌的清除、抑酸治疗、促胃肠动力药、抗抑郁药等.总的来说,根据主要症状来选择治疗方法是可行和有效的.  相似文献   
35.
BACKGROUND: In allergic conditions, the degree of skin test reactivity does not always correlate with the severity of clinical symptoms. Additional factors may contribute to the reported symptom severity. OBJECTIVES: To investigate the association between the magnitude of the skin prick test (SPT) response and the reported symptom severity in patients with allergic rhinitis and the possible modifying role of psychological factors. METHODS: One hundred four patients with allergic rhinitis and 23 with non-allergic rhinitis, classified according to their SPT response to 19 aeroallergens, were asked to rate the severity of five symptoms and to indicate whether their symptoms intensified on exposure to five common aeroallergens. They also completed a psychological questionnaire. Results Reported symptom severity of allergic rhinitis did not correlate with weal size for any of the aeroallergens tested or with the number of positive responses on SPT. It was not related to patient age, sex, or education. The reported symptoms severity correlated positively (0.29, P < 0.01) with reported symptom intensification on exposure to allergens. Moreover, both outcomes were positively associated with the psychological factors of hypochondriasis (0.20, P < 0.05 and 0.18, P < 0.05, respectively), and somatic awareness (0.24, P < 0.05 and 0.33, P < 0.01, respectively), but not with neuroticism. CONCLUSIONS: The severity of symptoms experienced by patients with allergic rhinitis is apparently not related to the magnitude of SPT response, but rather to psychological factors of hypochondriasis and somatic awareness. Physicians should be aware of the contribution of psychological factors to patient perceptions of the intensity of symptoms and of the intensification of symptoms on their exposure to allergens.  相似文献   
36.
37.
Chronic intestinal pseudo-obstruction (CIPO) is a rare pathological condition characterized by a marked derangement of gut propulsive motility mimicking mechanical obstruction, in the absence of any lesion occluding the gut lumen. This disease is often associated with a disabling and potentially life-threatening complications and is still too often unrecognized even in referral centres. As a result, patients receive neither appropriate care nor recognition of their severe health condition. Medical and surgical therapies are often unsatisfactory and long-term outcome turns out to be poor in the vast majority of cases. This article focuses on the main clinical features, the management and long-term outcome of patients affected by CIPO, with particular emphasis on those aspects which remain a matter of debate.  相似文献   
38.
This is a retrospective review of the results at our institution of using multi-detector CT angiography (CTA) to localise lower gastrointestinal (GI) bleeding. We hypothesised that in our patient population: (i) CTA was unlikely to demonstrate bleeding in patients who were haemodynamically stable; (ii) in haemodynamically unstable patients in whom CTA was undertaken, the results could be used to select patients who would benefit from catheter angiography; and (iii) in haemodynamically unstable patients in whom CTA was undertaken, a subgroup of patients could be identified who would benefit from primary surgical treatment, avoiding invasive angiography completely. A retrospective review was conducted of the clinical records of all patients undergoing CTA for lower GI haemorrhage at our institution between 1 January 2005 and 30 June 2007. Out of the 20 patients examined, 10 had positive CTAs demonstrating the bleeding site. Nine were haemodynamically unstable at the time of the study. Four patients with positive CT angiograms were able to be treated directly with surgery and avoided invasive angiography. Ten patients had negative CTAs. Four of these were haemodynamically unstable, six haemodynamically stable. Only one required intervention to secure haemostasis, the rest stopped spontaneously. No haemodynamically stable patient who had a negative CTA required intervention. CTA is a useful non-invasive technique for localising the site of lower GI bleeding. In our patient population, in the absence of haemodynamic instability, the diagnostic yield of CTA was low and bleeding was likely to stop spontaneously. In haemodynamically unstable patients, a positive CTA allowed patients to be triaged to surgery or angiography, whereas there was a strong association between a negative CTA and spontaneous cessation of bleeding.  相似文献   
39.
Introduction Amisulpride is a substituted benzamide that, at low doses, selectively blocks D2 and D3 presynaptic dopamine receptors, enhancing dopaminergic transmission in frontal cortex and limbic areas. Many clinical studies versus placebo, tricyclic antidepressants and selective serotonin reuptake inhibitors showed amisulpride antidepressant effect, supporting its safety and rapid onset of action. In oncological population, depression is quite frequent and difficult to treat because of the particular sensitivity of cancer patients to the antidepressants’ side effects. Goals of work The aims of this study were to evaluate efficacy, safety and tolerability of low doses of amisulpride (50 mg) in oncological, depressed patients during chemotheraphy. Materials and methods One hundred six consecutive cancer outpatients with depressive symptoms were treated in a prospective, intention to treat, 4-week study, and were evaluated in single-blind with Montgomery Asberg rating scale for depression (MADRS), clinical global impression (CGI) and dosage record treatment emergent symptom scale (DOTES) to assess side effects of treatment. Main results After 4 weeks of treatment, scores of MADRS and CGI significantly improved (p < 0.002; p < 0.001, respectively), with a reduction of depressive symptoms concerning both emotional (such as apparent sadness, reported sadness, inner tension, etc.) and physical cluster (such as lack of appetite, reduction in weight, tiredness and insomnia) with good tolerability (only two patients dropped out). Conclusions This study is the first trial on the use of amisulpride in a cohort of oncological, depressed patients during chemotherapy. Amisulpride demonstrated high efficacy and safety. Controlled studies are needed to confirm these preliminary data.  相似文献   
40.
《诸病源侯论》论毒邪篇幅之多,明目之清,发前人所未发,打破传统束缚,注重临床实际。如其提出毒邪判断要以阴阳为纲;毒邪向内为病重,向外为病轻;赤白为轻,青紫黑为重;过肘膝为重,以及伤肠胃心肝脾肾均有不同的症状特征,提示了六淫从化于毒,毒邪与六淫有不同表现等问题,值得一读。  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