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   57714篇
  免费   5194篇
  国内免费   1234篇
耳鼻咽喉   383篇
儿科学   777篇
妇产科学   1333篇
基础医学   4293篇
口腔科学   1616篇
临床医学   13156篇
内科学   5565篇
皮肤病学   371篇
神经病学   3870篇
特种医学   1623篇
外国民族医学   5篇
外科学   8385篇
综合类   5072篇
一般理论   6篇
预防医学   2995篇
眼科学   163篇
药学   4448篇
  65篇
中国医学   2299篇
肿瘤学   7717篇
  2024年   112篇
  2023年   1346篇
  2022年   2078篇
  2021年   3119篇
  2020年   2870篇
  2019年   3307篇
  2018年   3192篇
  2017年   2861篇
  2016年   2299篇
  2015年   2263篇
  2014年   4502篇
  2013年   4931篇
  2012年   3056篇
  2011年   3344篇
  2010年   2579篇
  2009年   2526篇
  2008年   2910篇
  2007年   2424篇
  2006年   2086篇
  2005年   1635篇
  2004年   1454篇
  2003年   1180篇
  2002年   912篇
  2001年   852篇
  2000年   688篇
  1999年   670篇
  1998年   537篇
  1997年   499篇
  1996年   436篇
  1995年   377篇
  1994年   367篇
  1993年   275篇
  1992年   251篇
  1991年   199篇
  1990年   137篇
  1989年   163篇
  1988年   124篇
  1987年   131篇
  1986年   125篇
  1985年   189篇
  1984年   195篇
  1983年   153篇
  1982年   190篇
  1981年   138篇
  1980年   117篇
  1979年   97篇
  1978年   60篇
  1977年   40篇
  1976年   50篇
  1975年   39篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Objective: The aim of this study was to determine the prevalence of low back pain (LBP) in a primary care setting population and examine its association with the symptoms of depression and somatization. Methods: This is a cross‐sectional study, utilising a survey carried out in primary health care clinics (PHCs) in Al‐Ain, United Arab Emirates (UAE). A multistage stratified sampling design was used and a representative sample of 1304 UAE nationals aged 18–65 years who attended PHC clinics for any reason were included and 1103 (84.5%) subjects agreed to participate and responded to the questionnaire during a period from June 2001 to January 2002. A specially designed questionnaire with three parts was used for the data collection: socio‐demographic information of the studied subjects, modified version of the Roland‐Morris scale for evaluating back‐related functional disability and SCL‐90 R for depression and somatization subscales was used to assess depressive and somatic symptoms. Results: Of the total number of subjects surveyed (1103), 586 (53.1%) were men and 517 (46.9%) women. The mean age was 34.9 ± 13.4 years for men and 33.5 ± 11.8 years for women. The prevalence of LBP in the studied subjects was 64.7% (95% CI, 60.7–68.5] with 46.7% among men and 53.3% among women. There were a significant differences between the subjects with LBP and without LBP with respect to gender (P < 0.001), body mass index (BMI) (P < 0.001), occupational status (P < 0.001) and living environment (P = 0.016). Functional disability was higher in patients with LBP. Young patients in aged 15–34 years, patients with preparatory/secondary educational level and students showed higher depressive symptoms. A similar pattern was found in patients with somatic symptoms. Factor analysis revealed a strong association between depression and somatization in LBP patients. Conclusions: Functional disability was higher in with LBP. Furthermore, symptoms of depression and somatization are prevalent among LBP patients.  相似文献   
152.
福建省原发性肝癌遗传因素分析   总被引:4,自引:0,他引:4  
为了探讨遗传因素与福建省原发性肝癌的关系,应用多种对照配对的病例对照研究方法,对100个原发性肝癌和200个对照家系进行了遗传流行病学分析。结果显示,原发性肝癌先证者一、二级亲属患病率明显高于对照组患病率,分离比为0.04146~0.08654,遗传度加权均值为63.52±4.22%。提示原发性肝癌系多基因遗传病,遗传易感性是原发性肝癌的危险因素之一,原发性肝癌的发生是遗传和环境多种因素共同作用的结果。  相似文献   
153.
盘龙七片治疗不稳定性冠心病心绞痛临床观察   总被引:1,自引:0,他引:1  
对58例不稳定性冠心病心绞痛患者,用盘龙七片(38例)及复方丹参片(20例)治疗,观察治疗前后心电图ST段,血液流变学及临床症状的变化,结果:盘龙七片组心电图ST段的缺血变化明业优于复方丹参片组(P〈0.01),血浆粘度及纤维蛋白原下降亦明显(P〈0.05或P〈0.01),结论:盘龙七片虽是一种抗风湿,骨伤的中成药,但同样对治疗不稳定性冠心病心绞痛有一定的疗效。  相似文献   
154.
Studies on the effectiveness of pain management have uniformly concluded that health care providers underestimate or undertreat pain. In the emergency department (ED) in which this study was conducted, physicians receive formal didactic and bedside teaching on pain recognition and management in order to heighten the awareness of patient's need for pain control. The purpose of this study was to determine if this outpatient pain management of patients with acute, painful conditions is better than that reported in the medical literature. In this prospective study, 110 adult patients who had an acute, painful diagnosis were telephoned 48 hours after discharge from the ED and asked if they felt their pain at home was well controlled. Patient satisfaction with pain control was higher (91%) than that reported in the medical literature. Also, pain medication was provided more frequently by this study's ED (95%). Education on pain awareness and treatment is a way to improve pain management.  相似文献   
155.
In response     
  相似文献   
156.
157.
Summary A case of a 31-year-old female with congenital esophageal stenosis presenting with symptoms of chest pain caused by esophageal dysmotility is described. The involved segment in congenital esophageal stenosis has a characteristic thickening of the muscularis propria layer, as seen by EUS examination. In these patients, symptoms of dysphagia can be managed with esophageal dilation and noncardiac esophageal chest pain responds to pharmacotherapy with diltiazem.The opinions and assertions contained herein are the private ones of the authors and are not to be construed as official policy or reflecting the views of the Army or the Department of Defense.  相似文献   
158.
A critically important aspect of supportive care in cancer is the prompt recognition and effective treatment of psychiatric complications. Psychiatric disorders such as depression, anxiety and delirium occur in a signifcant percentage of cancer patients, particularly as disease advances and as cancer treatments become more aggressive. This paper reviews factors that can be utilized to identify patients who are at increased risk for developing psychiatric complications, such as those with advanced disease, certain cancer treatments, uncontrolled physical symptoms, functional limitations, lack of social support, and past history of psychiatric disorder. Methods of diagnostic assessment and strategies for managing depression, anxiety, delirium and suicidal ideation are also reviewed.Presented as an invited lecture at the 6th International Symposium: Supportive Care in Cancer, New Orleans, La., USA, 2–5 March 1994  相似文献   
159.
160.
晚期肿瘤疼痛病人31例(男性17例,女性14例,年龄50±514a),用丙氧氨酚2片,po,tid,共7d。相似病人30例(男性16例,女性14例,年龄51±13a),用酮咯酸10mg,po,qid,共7d。结果:疼痛强度(标尺法)2组均有降低;显效时间前组(丙氧氨酚)快于后组(酮咯酸);药效维持时间后组长于前组;不良反应前组嗜睡多于后组,而胃肠道不适少于后组。  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