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   74670篇
  免费   4006篇
  国内免费   716篇
耳鼻咽喉   158篇
儿科学   3041篇
妇产科学   739篇
基础医学   3306篇
口腔科学   554篇
临床医学   29638篇
内科学   12442篇
皮肤病学   521篇
神经病学   2923篇
特种医学   2603篇
外国民族医学   2篇
外科学   9176篇
综合类   5141篇
现状与发展   4篇
一般理论   46篇
预防医学   3431篇
眼科学   190篇
药学   3893篇
  62篇
中国医学   426篇
肿瘤学   1096篇
  2024年   84篇
  2023年   2492篇
  2022年   3469篇
  2021年   4963篇
  2020年   4412篇
  2019年   3044篇
  2018年   3384篇
  2017年   3035篇
  2016年   2757篇
  2015年   2719篇
  2014年   5717篇
  2013年   5328篇
  2012年   4844篇
  2011年   4006篇
  2010年   3574篇
  2009年   3232篇
  2008年   2590篇
  2007年   2580篇
  2006年   2223篇
  2005年   1949篇
  2004年   1651篇
  2003年   1431篇
  2002年   1373篇
  2001年   1248篇
  2000年   1147篇
  1999年   1181篇
  1998年   620篇
  1997年   505篇
  1996年   520篇
  1995年   492篇
  1994年   396篇
  1993年   142篇
  1992年   392篇
  1991年   308篇
  1990年   311篇
  1989年   273篇
  1988年   264篇
  1987年   83篇
  1986年   10篇
  1985年   223篇
  1984年   151篇
  1983年   91篇
  1982年   64篇
  1981年   44篇
  1980年   52篇
  1979年   3篇
  1977年   3篇
  1976年   4篇
  1975年   2篇
  1943年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
BackgroundThe anatomic course of the phrenic nerve runs in the fascia covering the anterior scalene muscle. Interscalene blocks are commonly performed by an anesthesiologist for shoulder surgery, such as a rotator cuff repair, total shoulder replacement, humeral fracture, or other arm surgery. Phrenic nerve palsy or paralysis is a known complication from interscalene block and is covered in multiple case reports and series in both Anesthesia and Neurosurgical literature, but only one case report in the Emergency Medicine literature.Case ReportThis case involves a 57-year-old man who had an uncomplicated arthroscopic rotator cuff repair with placement of interscalene block under care of anesthesia. He was discharged with a pain pump in place and then subsequently presented to the Emergency Department (ED) later that same day for evaluation of dyspnea. Using point-of-care ultrasound, his right diaphragm did not appear to be moving. Chest x-ray study revealed an elevated right hemidiaphragm. He was diagnosed with iatrogenic right phrenic nerve paralysis from interscalene block.Why Should an Emergency Physician Be Aware of This?Emergent diagnosis of phrenic nerve paralysis in the ED is complicated by a distressed patient and need for quick intervention. Most formal tests for this diagnosis are not immediately available to emergency physicians. Ultrasound is a rapid and reproducible, noninvasive resource with high sensitivity and specificity, making it an ideal imaging modality for the emergent evaluation of possible phrenic nerve palsy or paralysis.  相似文献   
72.
《Academic pediatrics》2020,20(5):619-627
ObjectiveIn contrast with multimorbidity during adulthood, the relationship of childhood multimorbidity with socioeconomic position (SEP) is poorly understood. We aimed to describe early childhood multimorbidity and investigate the relationship of this with SEP.MethodsWithin a diverse prospective child cohort study, we determined associations of SEP with multimorbidity (defined as the presence of 2 or more chronic conditions) at age 2 years. Maternal SEP was ranked into 5 categories using an index constructed from variables collected antenatally describing maternal education, employment, financial stress, beneficiary status, housing tenure, overcrowding, and residential mobility. Missing values were handled using multiple imputation with chained equations. Independent associations of SEP with multimorbidity were described using adjusted odds ratios (OR) and 95% confidence intervals (CI).ResultsOf the 6822 women and 6853 children who were enrolled into the cohort study, 5737 (84%) mother-child dyads had complete antenatal data and were interviewed at age 2 years. Of these 5737, for 3826 (67%) dyads, there were complete data for all variables. Multimorbidity was present in 374/3838 (9.7%) of the cohort children. After multiple imputation and adjustment for maternal ethnicity, smoking, poor health, depressive symptoms, and child gender, the odds of multimorbidity being present were increased for children of mothers in the most (OR 1.74, 95% CI 1.16–2.59) and second most (OR 1.43, 95% CI 1.00–2.04) versus the least disadvantaged group.ConclusionThe odds of multimorbidity are increased for children whose mothers have lower SEP. Cumulative socioeconomic disadvantage increases the potential for a chronic illness trajectory to develop in early childhood.  相似文献   
73.
74.
75.
76.
目的探讨心达康滴丸联合盐酸地尔硫卓片治疗冠心病心绞痛的临床疗效。方法选择2018年7月—2019年7月在武汉市江夏区中医医院治疗的冠心病心绞痛患者94例,根据用药的差别分成对照组(47例)和治疗组(47例)。对照组口服盐酸地尔硫卓片,30mg/次,3次/d;治疗组在对照组基础上口服心达康滴丸,18粒/次,3次/d。两组患者均经4周治疗。观察两组患者临床疗效,同时比较治疗前后两组患者心绞痛发作次数和持续时间,临床症状积分、SAQ和GQOLI-74评分,血清C反应蛋白(CRP)、S100钙结合蛋白A12(S100A12)、白细胞介素-18(IL-18)、妊娠相关血清蛋白A(PAPP-A)、内皮素-1(ET-1)和肌钙蛋白I(CTnI)水平及心功能。结果治疗后,对照组和治疗组临床有效率分别为80.85%和97.87%,两组比较差异具有统计学意义(P0.05)。治疗后,两组患者心绞痛发作次数及持续时间都显著改善降低(P0.05),且治疗组比对照组改善更显著(P0.05)。治疗后,两组患者SAQ积分和GQOLI-74评分均明显升高,而临床症状积分明显降低(P0.05),且治疗组这些评分明显好于对照组(P0.05)。治疗后,两组患者血清CRP、S100A12、IL-18、PAPP-A、ET-1、CTnI水平均明显降低(P0.05),且治疗组明显低于对照组(P0.05)。治疗后,两组患者左心室射血分数(LVEF)和心排血量(CO)均升高,而左室收缩末期内径(LVESD)明显降低(P0.05),且治疗组LVEF、CO和LVESD比对照组改善更明显(P0.05)。结论心达康滴丸联合盐酸地尔硫卓片治疗冠心病心绞痛可明显改善患者临床症状,改善生活质量,具有一定的临床推广应用价值。  相似文献   
77.
78.
BackgroundA number of key publications in recent years have advocated a more integrated vision of UK primary care involving increased multi-professional communication and understanding. This has resulted in a marked change in the roles being undertaken by pharmacists. Community pharmacists have traditionally provided a medicine supply function and treated minor ailments in addition to delivering a suite of locally commissioned services; however these functions have not necessarily been part of a programme of care involving the other clinicians associated with the patient. An integrated model of care would see much closer working between pharmacy and general practice but also with pharmacists not only working with, but in the practice, in an enhanced patient-facing role, trained as independent prescribers. This has implications for the dynamics amongst professionals in this environment.ObjectivesThis exploratory multiple case study attempts to explore these changing dynamics across ten GP surgeries throughout the South-East of England.MethodsSemi-structured, in-depth interviews were conducted with one nurse, one pharmacist and one physician from each clinic, and survey data was collected from 38 patients who had appointments with a pharmacist.ResultsThe data suggested that the pharmacists who had enhanced roles perceived some uncertainty about their professional role and identity, which resulted in instability and insecurity and that this uncertainty led to both professional and interprofessional tension with their primary care colleagues. The survey data revealed that n = 35 (92%) patients stated they were ‘very satisfied’ or ‘satisfied’ with their appointment. And n = 37 (97%) were ‘very comfortable’ or ‘comfortable’ discussing their medications with the pharmacist. In addition, 36 patients (95%) reported that they strongly agreed or agreed with the clinical recommendations made by the pharmacist.ConclusionsThese findings are discussed in relation to role expansion and professional/interprofessional relations before key practical suggestions are offered.  相似文献   
79.
80.
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