全文获取类型
收费全文 | 312592篇 |
免费 | 20849篇 |
国内免费 | 6987篇 |
专业分类
耳鼻咽喉 | 3010篇 |
儿科学 | 10325篇 |
妇产科学 | 4636篇 |
基础医学 | 22822篇 |
口腔科学 | 8462篇 |
临床医学 | 42945篇 |
内科学 | 47288篇 |
皮肤病学 | 3669篇 |
神经病学 | 16112篇 |
特种医学 | 13034篇 |
外国民族医学 | 22篇 |
外科学 | 36153篇 |
综合类 | 27954篇 |
现状与发展 | 28篇 |
一般理论 | 91篇 |
预防医学 | 52628篇 |
眼科学 | 4745篇 |
药学 | 27934篇 |
155篇 | |
中国医学 | 5375篇 |
肿瘤学 | 13040篇 |
出版年
2023年 | 4520篇 |
2022年 | 6054篇 |
2021年 | 14769篇 |
2020年 | 10390篇 |
2019年 | 15871篇 |
2018年 | 10120篇 |
2017年 | 8948篇 |
2016年 | 10812篇 |
2015年 | 13641篇 |
2014年 | 23992篇 |
2013年 | 23687篇 |
2012年 | 24271篇 |
2011年 | 21735篇 |
2010年 | 18847篇 |
2009年 | 18518篇 |
2008年 | 16979篇 |
2007年 | 17040篇 |
2006年 | 14345篇 |
2005年 | 9833篇 |
2004年 | 5871篇 |
2003年 | 5090篇 |
2002年 | 3958篇 |
2001年 | 3401篇 |
2000年 | 3024篇 |
1999年 | 1951篇 |
1998年 | 2300篇 |
1997年 | 2006篇 |
1996年 | 1566篇 |
1995年 | 1555篇 |
1994年 | 1475篇 |
1993年 | 1204篇 |
1992年 | 1358篇 |
1991年 | 1210篇 |
1990年 | 1219篇 |
1989年 | 1138篇 |
1988年 | 1088篇 |
1987年 | 929篇 |
1986年 | 772篇 |
1985年 | 1773篇 |
1984年 | 1896篇 |
1983年 | 1385篇 |
1982年 | 1466篇 |
1981年 | 1427篇 |
1980年 | 1269篇 |
1979年 | 1098篇 |
1978年 | 847篇 |
1977年 | 840篇 |
1976年 | 734篇 |
1975年 | 504篇 |
1974年 | 519篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Itay Zmora Yonit Wiener-Well Evan Avraham Alpert 《The American journal of emergency medicine》2019,37(5):1006.e5-1006.e7
Background
Purulent bacterial pericarditis is a rare and potentially fatal disease. The course may be fulminant, and the presentation may pose a diagnostic challenge.Case report
An otherwise healthy 75-year-old male was brought to the emergency department in a state of general deterioration, confusion, and shock. Bedside ultrasound showed a significant pericardial effusion. His condition quickly deteriorated and the resuscitation included emergent bedside pericardiocentesis. The drainage was purulent and later cultures grew out Streptococcus pneumoniae.Why should an emergency physician be aware of this?
Purulent pericarditis is extremely rare but should be considered in the patient with a fulminant infectious process (particularly pneumonia) and signs of pericardial effusion. Treatment should include appropriate antibiotics and early drainage. 相似文献72.
73.
B Maybury A Powell-Chandler N Kumar 《Annals of the Royal College of Surgeons of England》2015,97(3):e37-e38
We report two British cases of liver abscess, due to Klebsiella pneumoniae and associated with synchronous infection elsewhere, which required liver resection for definitive treatment. They illustrate the geographic spread of aggressive K pneumoniae liver infection and demonstrate the importance of early aggressive treatment. 相似文献
74.
目的探讨神经内镜辅助下经鼻蝶入路切除鞍区肿瘤的方法和优势。方法回顾性分析30例鞍区肿瘤病人的临床资料,垂体腺瘤26例(其中无功能垂体腺瘤6例、泌乳素瘤16例、垂体生长激素腺瘤4例),拉克囊肿1例,胆脂瘤1例,脑膜瘤1例,颅咽管瘤1例。采用神经内镜辅助下经鼻蝶入路手术切除肿瘤。结果肿瘤全切27例,部分切除3例。术后3例发生脑脊液鼻漏,经腰大池持续引流后痊愈。无死亡病例。随访3~6个月,病人恢复良好。结论在神经内镜辅助下经鼻蝶入路治疗鞍区肿瘤,较单纯的显微镜手术治疗创伤更小,肿瘤全切率更高。 相似文献
75.
《Pediatric clinics of North America》2015,62(6):1463-1477
76.
目的:观察清肝解郁和健脾补肾法治疗肝火上亢型慢性肾衰(CRF)合并高血压患者的临床效果。方法:选取2016年6月至2018年6月京东誉美医院收治的肝火上亢型CRF合并高血压患者90例作为研究对象,按照随机数字表法随机分为对照组和观察组,每组45例。对照组给予口服硝苯地平控释片治疗,观察组在对照组治疗基础上给予清肝解郁、健脾补肾汤治疗,每4周为1个疗程,均治疗3个疗程。比较治疗前后中医症状评分、收缩压(SBP)、舒张压(DBP)变化;比较2组临床疗效;比较治疗前后肾功能指标:尿素氮(BUN)、血肌酐(Scr)、24 h尿蛋白定量(24 hPRO);统计治疗期间2组不良反应发生情况。结果:治疗前观察组与对照组中医症状评分、SBP、DBP、BUN、Scr、24 hPRO比较,差异均无统计学意义(P>0.05),治疗后2组患者中医症状评分、SBP、DBP、BUN、Scr、24 hPRO均显著降低(P<0.05),观察组均低于对照组,差异有统计学意义(P<0.05);2组临床疗效比较,差异有统计学意义(P<0.05),且观察组总有效率显著高于对照组,差异有统计学意义(P<0.05);观察组和对照组不良反应发生率分别为2.22%和6.67%,2组比较差异无统计学意义(P>0.05)。结论:清肝解郁、健脾补肾法辅助治疗肝火上亢型CRF合并高血压疗效确切,可较好控制血压,并且可显著改善肾功能,减少不良反应发生情况。 相似文献
77.
78.
Nolwazi Mkhwanazi 《Medical anthropology》2016,35(2):193-202
In the growing number of publications in medical anthropology about sub-Saharan Africa, there is a tendency to tell a single story of medicine, health, and health-seeking behavior. The heavy reliance on telling this singular story means that there is very little exposure to other stories. In this article, I draw on five books published in the past five years to illustrate the various components that make up this dominant narrative. I then provide examples of two accounts about medicine, health, and health-seeking behavior in Africa that deviate from this dominant narrative, in order to show the themes that alternative accounts have foregrounded. Ultimately, I make a plea to medical anthropologists to be mindful of the existence of this singular story and to resist the tendency to use its components as scaffolding in their accounts of medicine, health, and health-seeking behavior in Africa. 相似文献
79.
Yang Liu Yanyan Gao Hengliang Liu Qi Chen Jinrui Ji Kailong Jia 《Arquivos brasileiros de cardiologia》2021,116(2):229
BackgroundDual antiplatelet therapy (DAPT) is the cornerstone treatment of acute myocardial infarction (AMI).ObjectiveThe present study aimed to investigate the efficacy and safety of triple antiplatelet therapy (TAPT) in elderly female patients with diabetes and ST segment elevation myocardial infarction (STEMI), who had undergone percutaneous coronary intervention (PCI).MethodsWe designed a randomized, single-blind study. Control group A (97 elderly male patients with diabetes and STEMI, whose CRUSADE scores were < 30) received aspirin, ticagrelor, and tirofiban. A total of 162 elderly female patients with diabetes and STEMI were randomly divided into two groups according to CRUSADE score. Group B (69 patients with CRUSADE score > 31) received aspirin and ticagrelor. Group C (93 patients with CRUSADE score < 30) received aspirin, ticagrelor and tirofiban. P values < 0.05 were considered statistically significant.ResultsCompared to the findings in group A, post-PCI Thrombolysis in Myocardial Infarction (TIMI) grade 3 blood flow and TIMI myocardial perfusion grade 3 were significantly less prevalent in group B (p < 0.05). When compared to groups A and C, the incidence of major adverse complications was significantly higher in group B (p < 0.05).ConclusionTAPT could effectively reduce the incidence of major complications in elderly female patients with diabetes and STEMI. However, close attention should be paid to hemorrhage in patients receiving TAPT. (Arq Bras Cardiol. 2020; [online].ahead print, PP.0-0) 相似文献
80.
Sajid Amit Lumbini Barua Abdulla - Al Kafy 《Diabetes & Metabolic Syndrome: Clinical Research & Reviews》2021,15(4):102129
Background and aimsWorldwide the COVID-19 pandemic has accelerated sufferings of mental health and behaviour attitudes of people. Many countries, including Bangladesh, reported suicide as extreme consequences of the psychological burden influenced by COVID-19. The present study explores human stress and its factor influenced by COVID-19 in Bangladesh, which significantly affect the quality of life.MethodsAn online-based questionnaire survey was conducted among 651 adult Bangladeshi populations by capturing socio-demographic information, possible human stress, and consequences of the pandemic. A set of statistical tools such as Pearson's Correlation Matrix (PCM), T-test, Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA) were applied to identify the relationship between different factors and influential factors increasing human stress.ResultsMore than 83% of the participants are facing COVID-19 related mental stress, which results in short temper, sleep disorder, and family chaos. PCA and HCA outcomes indicated a significant relationship between the respondents' opinions and human stress factors, which harmonized with the country's existing scenario. PCM results enlighten the relationship between human stress factors and found financial hardship, cutting back daily spending, and food crisis are interconnected together causes stress. Also, hampering students' formal education and future career plans significantly contribute to mental stress.ConclusionBased on the above findings, it's crucial to introduce a time-oriented strategy and implement precaution monitoring plans for Bangladesh. The rescue plan will help people to manage the pandemic and improve mental health to fight against psychological challenges related to COVID-19 and future pandemics. 相似文献