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   103472篇
  免费   5439篇
  国内免费   838篇
耳鼻咽喉   1607篇
儿科学   3466篇
妇产科学   3040篇
基础医学   11460篇
口腔科学   3049篇
临床医学   8235篇
内科学   23405篇
皮肤病学   2667篇
神经病学   6981篇
特种医学   2327篇
外国民族医学   2篇
外科学   11026篇
综合类   5062篇
一般理论   29篇
预防医学   12999篇
眼科学   1622篇
药学   6744篇
中国医学   1470篇
肿瘤学   4558篇
  2023年   670篇
  2022年   1587篇
  2021年   2978篇
  2020年   1488篇
  2019年   2500篇
  2018年   3123篇
  2017年   1953篇
  2016年   2015篇
  2015年   2163篇
  2014年   3296篇
  2013年   4695篇
  2012年   6263篇
  2011年   7812篇
  2010年   4361篇
  2009年   3452篇
  2008年   5256篇
  2007年   5302篇
  2006年   5045篇
  2005年   5321篇
  2004年   6380篇
  2003年   5982篇
  2002年   5096篇
  2001年   3512篇
  2000年   2961篇
  1999年   2673篇
  1998年   1485篇
  1997年   1193篇
  1996年   808篇
  1995年   715篇
  1994年   757篇
  1993年   804篇
  1992年   1049篇
  1991年   885篇
  1990年   690篇
  1989年   531篇
  1988年   502篇
  1987年   448篇
  1986年   444篇
  1985年   377篇
  1984年   234篇
  1983年   233篇
  1982年   191篇
  1981年   195篇
  1980年   173篇
  1979年   214篇
  1978年   195篇
  1974年   166篇
  1973年   139篇
  1971年   124篇
  1969年   126篇
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
1.
Most surgical and anaesthetic mortality and morbidity occurs postoperatively, disproportionately affecting low- and middle-income countries. Various short courses have been developed to improve patient outcomes in low- and middle-income countries, but none specifically to address postoperative care and complications. We aimed to identify key features of a proposed short-course addressing this topic using a Delphi process with low- and middle-income country anaesthesia providers trained as short-course facilitators. An initial questionnaire was co-developed from literature review and exploratory workshops to include 108 potential course features. Features included content; teaching method; appropriate participants; and appropriate faculty. Over three Delphi rounds (panellists numbered 86, 64 and 35 in successive cycles), panellists indicated which features they considered most important. Responses were analysed by geographical regions: Africa, the Americas, south-east Asia and Western Pacific. Ultimately, panellists identified 60, 40 and 54 core features for the proposed course in each region, respectively. There were high levels of consensus within regions on what constituted core course content, but not between regions. All panellists preferred the small group workshop teaching method irrespective of region. All regions considered anaesthetists to be key facilitators, while all agreed that both anaesthetists and operating theatre nurses were key participants. The African and Americas regional panels recommended more multidisciplinary healthcare professionals for participant roles. Faculty from high-income countries were not considered high priority. Our study highlights variability between geographical regions as to which course features were perceived as most locally relevant, supporting regional adaptation of short-course design rather than a one-size-fits-all model.  相似文献   
2.
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...  相似文献   
3.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
4.
Breast pseudoaneurysms after a core needle biopsy are a rare complication with a low incidence. However, it is important to be aware of the possibility of complications that require treatment.  相似文献   
5.
6.
7.
8.
目的 对血清甲状腺球蛋白免疫复合物 (thyroglobulin circulating immune complex, Tg-CIC) 中抗甲状腺球蛋白抗体 (anti-thyroglobulin antibody, Tg-Ab) 含量检测,探讨 Tg-CIC 在甲状腺疾病中的临床以及流行病学意义。方法 收集甲状腺疾病患者血清标本 187 例,每例血清标本分为两组 ( 实验组和空白对照组 ),采用免疫复合物解离专利技术对甲状腺疾病患者血清标本 Tg-CIC 进行分离、解离,通过检测 Tg-CIC 解离后的 Tg-Ab 含量来间接反映甲状腺疾病患者血清中Tg-CIC 水平,按照不同的甲状腺疾病进行分组并对实验结果分析讨论。结果 不同甲状腺患者血清中 Tg-CIC 总阳性率达 92.51%,不同甲状腺疾病血清中 Tg-CIC 的阳性率差异无统计学意义 (χ?=2.917, P>0.05)。不同甲状腺疾病患者间血清游离 Tg-Ab 含量差异无统计学意义 (H=3.882, P>0.05),不同甲状腺疾病患者间血清 CIC 中 Tg-Ab 含量差异无统计学意义(H=5.5842, P>0.05)。不同甲状腺疾病患者中,甲状腺功能亢进、甲状腺炎以及甲状腺结节患者血清游离 Tg-Ab 的含量与血清 CIC 中的 Tg-Ab 含量呈正相关 (P<0.05),甲状腺功能减退、甲状腺肿瘤患者血清游离 Tg-Ab 的含量与血清 CIC 中的Tg-Ab 含量不相关 (P>0.05)。结论 在甲状腺疾病患者血清中,大部分可检出 Tg-CIC,与疾病类型无关。而甲状腺疾病患者中,甲状腺功能亢进、甲状腺炎以及甲状腺结节患者血清游离 Tg-Ab 含量与血清 CIC 中 Tg-Ab 含量存在相关性,为我们进一步了解 Tg-CIC 与甲状腺疾病的发生、发展的相关性研究奠定了基础,提供了新的研究视角。  相似文献   
9.

Background and objectives

A prompt and effective management of trauma patient is necessary. The aim of this case report is to highlight the importance of intraoperative echocardiography as a useful tool in patients suffering from refractory hemodynamic instability no otherwise explained.

Case report

A 41 year‐old woman suffered a car accident. At the emergency department, no abnormalities were found in ECG or chest X‐ray. Abdominal ultrasound revealed the presence of abdominal free liquid and the patient was submitted to urgent exploratory laparotomy. Nevertheless, she persisted suffering arterial hypotension and metabolic acidosis. Looking for the reason of her hemodynamic instability, intraoperative transthoracic echocardiography was performed, finding out the presence of pericardial effusion. Once the cardiac surgeon extracted pericardial clots, patient's situation improved clinically and analytically.

Conclusion

Every anesthesiologist should be able to use the intraoperative echocardiography as an effective tool in order to establish the appropriate measures to promote the survival of patients suffering severe trauma.  相似文献   
10.
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