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   189097篇
  免费   15195篇
  国内免费   4608篇
耳鼻咽喉   1555篇
儿科学   2777篇
妇产科学   3118篇
基础医学   24107篇
口腔科学   3513篇
临床医学   12636篇
内科学   23877篇
皮肤病学   2311篇
神经病学   12548篇
特种医学   6683篇
外国民族医学   1篇
外科学   15510篇
综合类   25704篇
现状与发展   21篇
一般理论   8篇
预防医学   14970篇
眼科学   2325篇
药学   30007篇
  60篇
中国医学   13793篇
肿瘤学   13376篇
  2023年   2285篇
  2022年   3232篇
  2021年   7527篇
  2020年   6676篇
  2019年   6635篇
  2018年   6663篇
  2017年   7357篇
  2016年   7332篇
  2015年   6826篇
  2014年   8086篇
  2013年   11833篇
  2012年   9901篇
  2011年   11835篇
  2010年   7442篇
  2009年   7459篇
  2008年   8988篇
  2007年   9986篇
  2006年   9360篇
  2005年   8703篇
  2004年   7516篇
  2003年   6727篇
  2002年   5243篇
  2001年   4783篇
  2000年   3964篇
  1999年   3335篇
  1998年   2425篇
  1997年   2546篇
  1996年   2286篇
  1995年   2155篇
  1994年   2061篇
  1993年   1738篇
  1992年   1601篇
  1991年   1504篇
  1990年   1291篇
  1989年   1068篇
  1988年   1024篇
  1987年   940篇
  1986年   869篇
  1985年   1244篇
  1984年   1025篇
  1983年   782篇
  1982年   805篇
  1981年   665篇
  1980年   645篇
  1979年   518篇
  1978年   339篇
  1977年   287篇
  1976年   266篇
  1975年   207篇
  1974年   156篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
黄亚楠  陶少平 《中国校医》2022,36(10):795-796
通过回顾分析我院2例确诊为胰岛素自身免疫综合征(IAS)患者的临床资料,并复习相关文献,总结发病机制及治疗方法,探讨IAS患者的临床特点,提高对低血糖症的诊治水平。  相似文献   
102.
美国食品药品管理局(FDA)于2022年7月发布了"治疗等效性评价供企业用指导原则"(草案)。该指导原则阐明了FDA治疗等效性的标准以及治疗等效性编码系统,目的是准确评价仿制药与参比制剂的治疗等效性并通过治疗等效性代码,在"橙皮书"中迅速检索到治疗等效的仿制药。而中国目前尚无类似的指导原则,详细介绍FDA该指导原则主要内容,期望对中国加强仿制药的治疗等效性评价和加速完善和实施符合国情的治疗等效性编码系统有所帮助。  相似文献   
103.
目的 运用科学知识图谱的手段,分析中医药治疗癫痫的研究进程并提炼重点。方法 设置检索时间为1990年至2020年,检索对象为中国知网(CNKI)该领域的相关文献,运用CiteSpace软件科学、准确地分析这些文献的作者信息、研究(发文)机构、关键词情况。结果 共计纳入文献793篇,马融-张喜莲、刘金民、谢炜、王洪图-张丽萍等领导核心作者团队,北京、广州以及广西中医药大学、天津中医药大学第一附属医院、南方医科大学等单位为主要进行相关研究的机构,高频关键词包括大鼠、难治性癫痫、小儿癫痫、海马、脑电图等,作用机制、网络药理学、肠道菌群、氧化应激、分子生物学等为近年来的热点与前沿。结论 通过借用知识图谱的分析能帮助提炼国内中医药治疗癫痫研究领域的重点,全面分析并科学判断近年来该领域的热点及前沿,为未来的研究夯实基础并把握方向。  相似文献   
104.

Objective

To examine the experience of interracial anxiety among health professionals and how it may affect the quality of their interactions with patients from racially marginalized populations. We explored the influence of prior interracial exposure—specifically through childhood neighborhoods, college student bodies, and friend groups—on interracial anxiety among medical students and residents. We also examined whether levels of interracial anxiety change from medical school through residency.

Data Source

Web-based longitudinal survey data from the Medical Student Cognitive Habits and Growth Evaluation Study.

Study Design

We used a retrospective longitudinal design with four observations for each trainee. The study population consisted of non-Black US medical trainees surveyed in their 1st and 4th years of medical school and 2nd and 3rd years of residency. Mixed effects longitudinal models were used to assess predictors of interracial anxiety and assess changes in interracial anxiety scores over time.

Principal Findings

In total, 3155 non-Black medical trainees were followed for 7 years. Seventy-eight percent grew up in predominantly White neighborhoods. Living in predominantly White neighborhoods and having less racially diverse friends were associated with higher levels of interracial anxiety among medical trainees. Trainees' interracial anxiety scores did not substantially change over time; interracial anxiety was highest in the 1st year of medical school, lowest in the 4th year, and increased slightly during residency.

Conclusions

Neighborhood and friend group composition had independent effects on interracial anxiety, indicating that premedical racial socialization may affect medical trainees' preparedness to interact effectively with diverse patient populations. Additionally, the lack of substantial change in interracial anxiety throughout medical training suggests the importance of providing curricular tools and structure (e.g., instituting interracial cooperative learning activities) to foster the development of healthy interracial relationships.  相似文献   
105.
刘凯  李婧 《安徽医药》2022,26(11):2141-2144
随着生活方式的改变,心脑血管疾病逐渐成为全人类死亡的“头号杀手”高于恶性肿瘤、糖尿病等。血脂的升高尤其是低密度脂蛋白胆固醇( LDL-C)的升高与动脉粥样硬化性心血管疾病( ASCVD)的发,生、发展息息相关。现有的专家共识、南提出他汀类药物是降低 LDL-C的一线用药,但仍可能会发生复发性缺血事件。人前蛋白转化酶枯草溶菌素 9(PCSK9)抑制指剂作为一类新型降脂药,有显著降低血 LDL-C水平,同时又可降低脂蛋白( a)的水平,又与 ASCVD与静脉血栓栓塞疾病( VTE)的发病可能相关。本文将系统地阐述新型降脂药 PCSK9抑制剂与 ASCVD、VTE的关系研究进展。  相似文献   
106.
ObjectiveThe Improving Medicare Post-Acute Care Transformation Act of 2014 mandates using standardized patient functional data across post-acute settings. This study characterized similarities and differences in clinician-observed scores of self-care and transfer items for the standardized section GG functional domain and the functional independent measure (FIM) at inpatient rehabilitation facilities.DesignWe conducted secondary analyses of 2017 Uniform Data System for Medical Rehabilitation national data. Patients were assessed by clinicians on both section GG and FIM at admission and discharge. We identified 7 self-care items and 6 transfer items in section GG conceptually equivalent with FIM. Clinician-assessed scores for each pair of items were examined using score distributions, Bland-Altman plot, correlation (Pearson coefficients), and agreement (kappa and weighted kappa) analyses.Setting and ParticipantsIn all, 408,491 patients were admitted to Uniform Data System for Medical Rehabilitation-affiliated inpatient rehabilitation facilities with one of the following impairments: stroke, brain dysfunction, neurologic condition, orthopedic disorders, and debility.MeasuresSection GG and FIM.ResultsPatients were scored as more functionally independent in section GG compared with FIM, but change score distributions and score orders within impairment groups were similar. Total scores in section GG had strong positive correlations (self-care: r = 0.87 and 0.95; transfer: r = 0.82 and 0.90 at admission and discharge, respectively) with total FIM scores. Weak to moderate ranking agreements with total FIM scores were observed (self-care: kappa = 0.49 and 0.60; transfers: kappa = 0.43 and 0.52 at admission and discharge, respectively). Lower agreements were observed for less able patients at admission and for higher ability patients of their change scores.Conclusions and ImplicationsOverall, response patterns were similar in section GG and FIM across impairments. However, variations exist in score distributions and ranking agreement. Future research should examine the use of GG codes to maintain effective care, outcomes, and unbiased reimbursement across post-acute settings.  相似文献   
107.
108.
109.
Objectives: To examine the factors associated with increase in lumbar spine bone mineral density (LS-BMD) by bisphosphonates (BPs) with active vitamin D analog (aVD).

Methods: Two independent postmenopausal osteoporotic patients treated by BPs with aVD for 24 months (Study 1: n?=?93, Study 2: n?=?99) were retrospectively analyzed.

Results: In Study 1, LS-BMD of the patients significantly increased for 24 m (5.4%, p?r2: 0.088, p?=?.02). While average sCa of the patients was 9.2?mg/dL before treatment, it increased time-dependently to 9.6?mg/dL for 24 m by treatment. As each patient had their LS-BMD five times during the study, there were four instances of %LS-BMD in each patient, resulting in 372 instances of %LS-BMD in Study 1. The smallest Akaike’s information criterion value for the most appropriate cut-off levels of sCa for %LS-BMD by treatment every 6 m was 9.3?mg/dL. The %LS-BMD by treatment for 6 m during 24 m period in patients with sCa ≥9.3?mg/dL (1.5%) was significantly higher than that in patients with sCa <9.3?mg/dL (0.8%, p?=?.038). The results of Study 2 were similar to those of Study 1, confirming the phenomena observed.

Conclusion: sCa was associated with an increased LS-BMD by BPs with aVD.  相似文献   
110.

Objective

This study aims to explore EBF promotion activities that have been carried out by ISP cadres during this time in the work area of the CHC in Rumbai Pesisir Pekanbaru Riau.

Method

The design of this study is a qualitative method with a phenomenological approach. Respondents in this study were ISP cadres with the determination of respondents using a purposive sampling approach, in order to obtain 11 respondents who appropriate the inclusion criteria as follows: cadres who are active in promoting exclusive EBF, cooperatives, aged ≤ 55 years, become a cadre for at least 2 years. Data collection methods in this study are through focus group discussion (FGD). Data processing from the FGD were analyzed according to the Colaizzi method.

Results

The results of the data analysis found five themes, namely: (1) Types of EBF promotion activities carried out by cadres, (2) cadre behavior in EBF promotions, (3) cadres’ ability to promote EBF, (4) constraints in carrying out EBF promotions, (5) the need for cadres to improve the ability of EBF promotions.

Conclusion

Needs for EBF promotion training and cadre guidebooks, guidance and supervision by community health centers (CHC) in the implementation of this EBF promotion.  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