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   35822篇
  免费   3074篇
  国内免费   1843篇
耳鼻咽喉   579篇
儿科学   513篇
妇产科学   820篇
基础医学   4209篇
口腔科学   566篇
临床医学   4219篇
内科学   6246篇
皮肤病学   813篇
神经病学   1921篇
特种医学   1198篇
外国民族医学   17篇
外科学   3623篇
综合类   4330篇
现状与发展   4篇
一般理论   7篇
预防医学   2351篇
眼科学   796篇
药学   3657篇
  24篇
中国医学   1674篇
肿瘤学   3172篇
  2024年   83篇
  2023年   487篇
  2022年   1158篇
  2021年   1541篇
  2020年   1122篇
  2019年   1170篇
  2018年   1290篇
  2017年   1096篇
  2016年   1046篇
  2015年   1553篇
  2014年   1908篇
  2013年   1898篇
  2012年   2669篇
  2011年   2812篇
  2010年   1799篇
  2009年   1345篇
  2008年   1936篇
  2007年   1840篇
  2006年   1870篇
  2005年   1831篇
  2004年   1337篇
  2003年   1277篇
  2002年   1100篇
  2001年   901篇
  2000年   823篇
  1999年   751篇
  1998年   459篇
  1997年   419篇
  1996年   336篇
  1995年   308篇
  1994年   282篇
  1993年   199篇
  1992年   339篇
  1991年   291篇
  1990年   231篇
  1989年   174篇
  1988年   195篇
  1987年   161篇
  1986年   127篇
  1985年   117篇
  1984年   84篇
  1983年   44篇
  1982年   25篇
  1981年   35篇
  1980年   21篇
  1979年   34篇
  1978年   24篇
  1977年   19篇
  1975年   18篇
  1973年   24篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
993.
994.
The purpose of this study is to summarize the manifestations, diagnosis, differential diagnosis, and treatment of childhood brucellosis in non-epidemic areas of China. A retrospective review of 16 admitted children patients with brucella’s disease who were diagnosed of brucellosis during the period from 2011 to 2016 was performed. Diagnostic criteria, clinical presentations, and outcomes were recorded. The most common symptom was fever. Osteoarticular involvement was found in 50% of the patients. They were infected by contacting with infected animals or consuming of unpasteurized milk or meat of sheep or goats, also. Standard agglutination test was positive in all patients and blood culture in 10 (62.5%) patients as well as medulloculture in 3 (18.8%) patients were positive. A combination of antibiotic treatment with rifampin plus cotrimoxazole showed good response and all clinical manifestations improved. Brucellosis is misdiagnosed frequently and should be considered in the differential diagnosis when patients do not respond to standard treatment. Blood culture, together with brucella serology test, is important and helpful in the diagnosis. MRI is a good method in differentiating those with symptoms of arthritis.  相似文献   
995.
996.
This article presents the case of a patient with haemorrhagic shock due to self-inflicted stab wounds to the chest and upper abdomen during a suicide attempt. Prehospital packing with chitosan gauze resulted in hemostasis and stabilisation of the patient during transport to the hospital. For uncontrolled bleeding from penetrating trauma the use of hemostyptic agents is an important option. The authors believe that hemostyptic agents should be introduced into clinical praxis of emergency medical services (EMS) and their use should be trained by EMS personnel.  相似文献   
997.
This study was aimed at assessing the effects of urokinase (UK) in combination with ultrasound and microbubbles in in vitro and in vivo thrombolytic therapy for the treatment of deep vein thrombosis (DVT). Thrombi with formation times of 1, 3, 7, 14 and 21 d were used for thrombolysis. Forty-five adult mongrel dogs were used to evaluate thrombosis in vivo. Both in vitro and in vivo analyses revealed that UK?+?microbubbles had the best effect among the combinations. Thrombolysis <7 d was more effective at a thrombolysis rate of about 50%, but the thrombolytic effect of thrombi >7 d was poor at thrombolysis rates <30%. Ultrasound?+?UK significantly increased the thrombolysis rate of thrombi <7 d. These results suggest that the combination of ultrasound with microbubble contrast agents and UK may have a synergistic effect on thrombolysis.  相似文献   
998.
IntroductionHistorically, it has been assumed that Intermediate Respiratory Care Units (IRCU) were efficient, because they saved costs by reducing the number of admissions to intensive care units (ICU), and effective, because they specialized in respiratory diseases.MethodsThe number of IRCU admissions and mortality rate, historically and in 2016, were evaluated. For 2016, the grouped Related Diagnostic Groups (DRGs) were also described, and the savings achieved under all budgetary headings by avoiding UCI stays were calculated. A multivariate analysis was performed to associate costs with mean weights and complexity, and multiple logistic regression was performed on all patients admitted from 2004 to 2017 to describe the variables associated with mortality in our unit.ResultsAn IRCU generates savings of €500,000/year by reducing length of ICU stay. Analysis of the 2016 cohort shows that costs correlate with mean weight and mortality, and consequently complexity. The multivariate logistic regression analysis of the 2004–2017 cohort found respiratory frequency, leukopenia, anemia, hyperkalemia, and acidosis to be the variables best associated with mortality. The area under the curve for the logistic model was 0.75.ConclusionThe IRCU analyzed in our study was efficient in terms of ‘avoided costs’ and savings associated with complexity. Our results suggest that IRCUs have a lower mortality rate than other similar units, and are therefore a safe environment for patients.  相似文献   
999.
Although exogenous melatonin supplementation has been suggested to be effective for episodic migraine prophylaxis, there is no conclusive evidence comparing the efficacy of exogenous melatonin supplementation to the other FDA-approved pharmacotherapy for episodic migraine prophylaxis. The aim of the current network meta-analysis (NMA) was to compare the efficacy of exogenous melatonin supplementation in patients with episodic migraine. The randomized placebo-controlled trials or randomized controlled trials (RCTs) incorporating a placebo in the study designs were included in our analyses. All of the NMA procedures were conducted under the frequentist model. The primary outcome was changes in frequency of migraine days and response rate after migraine prophylaxis with melatonin supplementation or pharmacological interventions. We included 25 RCTs in total with 4499 patients (mean age = 36.0 years, mean female proportion = 78.9%). The NMA demonstrated that migraine prophylaxis with oral melatonin 3 mg/d (immediate-release) at bedtime was associated with the greatest improvement in migraine frequency [mean difference = −1.71 days, 95% confidence interval (CI): −3.27 to −0.14 days compared to placebo] and the second highest response rate (odds ratio = 4.19, 95% CI = 1.46 to 12.00 compared to placebo). Furthermore, oral melatonin 3 mg (immediate-release) at bedtime was the most preferred pharmacological intervention among all of the investigated interventions when improvements in migraine frequency, response rate, dropout rate, and rates of any adverse events were taken into account. This pilot NMA suggests the potential prophylactic role of exogenous melatonin supplementation in patients with episodic migraine.  相似文献   
1000.
Su  Yu-Jih 《Clinical rheumatology》2020,39(12):3677-3684
Clinical Rheumatology - The early detection of psoriatic arthritis (PSA) poses a challenge to rheumatologists, even when their diagnosis is aided by sonography. In order to facilitate early...  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