全文获取类型
收费全文 | 31803篇 |
免费 | 2055篇 |
国内免费 | 360篇 |
专业分类
耳鼻咽喉 | 572篇 |
儿科学 | 512篇 |
妇产科学 | 408篇 |
基础医学 | 5593篇 |
口腔科学 | 739篇 |
临床医学 | 2551篇 |
内科学 | 6104篇 |
皮肤病学 | 1156篇 |
神经病学 | 2630篇 |
特种医学 | 1674篇 |
外科学 | 3842篇 |
综合类 | 206篇 |
现状与发展 | 1篇 |
一般理论 | 10篇 |
预防医学 | 1746篇 |
眼科学 | 763篇 |
药学 | 2785篇 |
中国医学 | 393篇 |
肿瘤学 | 2533篇 |
出版年
2023年 | 180篇 |
2022年 | 515篇 |
2021年 | 1084篇 |
2020年 | 547篇 |
2019年 | 804篇 |
2018年 | 952篇 |
2017年 | 765篇 |
2016年 | 1031篇 |
2015年 | 1490篇 |
2014年 | 1720篇 |
2013年 | 1930篇 |
2012年 | 2963篇 |
2011年 | 2808篇 |
2010年 | 1633篇 |
2009年 | 1403篇 |
2008年 | 2020篇 |
2007年 | 1812篇 |
2006年 | 1581篇 |
2005年 | 1429篇 |
2004年 | 1237篇 |
2003年 | 1052篇 |
2002年 | 949篇 |
2001年 | 635篇 |
2000年 | 543篇 |
1999年 | 450篇 |
1998年 | 193篇 |
1997年 | 144篇 |
1996年 | 102篇 |
1995年 | 115篇 |
1994年 | 81篇 |
1993年 | 70篇 |
1992年 | 181篇 |
1991年 | 191篇 |
1990年 | 151篇 |
1989年 | 159篇 |
1988年 | 127篇 |
1987年 | 128篇 |
1986年 | 129篇 |
1985年 | 104篇 |
1984年 | 85篇 |
1983年 | 77篇 |
1982年 | 56篇 |
1981年 | 50篇 |
1980年 | 42篇 |
1979年 | 59篇 |
1978年 | 61篇 |
1977年 | 53篇 |
1976年 | 38篇 |
1974年 | 38篇 |
1973年 | 44篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Su Jeong Seong Jin Pyo Hong Bong-Jin Hahm Hong Jin Jeon Jee Hoon Sohn Jun Young Lee Maeng Je Cho 《Journal of Korean medical science》2015,30(11):1675-1681
While decreasing trend in gender differences in alcohol use disorders was reported in Western countries, the change in Asian countries is unknown. This study aims to explore the shifts in gender difference in alcohol abuse (AA) and dependence (AD) in Korea. We compared the data from two nation-wide community surveys to evaluate gender differences in lifetime AA and AD by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Face-to-face interviews using the Composite International Diagnostic Interview (CIDI) were applied to all subjects in 2001 (n=6,220) and 2011 (n=6,022). Male-to-female ratio of odds was decreased from 6.41 (95% CI, 4.81-8.54) to 4.37 (95% CI, 3.35-5.71) for AA and from 3.75 (95% CI, 2.96-4.75) to 2.40 (95% CI, 1.80-3.19) for AD. Among those aged 18-29, gender gap even became statistically insignificant for AA (OR, 1.59; 95% CI, 0.97-2.63) and AD (OR, 1.18; 95% CI, 0.80-2.41) in 2011. Men generally showed decreased odds for AD (0.55; 95% CI, 0.45-0.67) and women aged 30-39 showed increased odds for AA (2.13; 95% CI 1.18-3.84) in 2011 compared to 2001. Decreased AD in men and increased AA in women seem to contribute to the decrease of gender gap. Increased risk for AA in young women suggests needs for interventions. 相似文献
12.
13.
14.
James I. Geller MD Joseph G. Pressey MD Malcolm A. Smith MD Rachel A. Kudgus PhD Mariana Cajaiba MD Joel M. Reid PhD David Hall PhD Donald A. Barkauskas PhD Stephen D. Voss MD Steve Y. Cho MD Stacey L. Berg MD Jeffrey S. Dome MD PhD Elizabeth Fox MD Brenda J. Weigel MD 《Cancer》2020,126(24):5303-5310
15.
Kyung Won Lee Mi Sook Cho Dayeon Shin 《International journal of food sciences and nutrition》2016,67(2):184-194
Urinary iodine concentrations (UICs) in the US have been reported to be stable since 1988–1994, although those in selected subgroups remained low. We aimed to investigate iodine status among adults (≥20 years) by two different criteria of assessing iodine deficiency in population. Utilizing National Health and Nutrition Examination Surveys 2001–2012, we conducted linear logistic regressions adjusting for covariates. The prevalence of <50?μg/L UIC was higher in women than in men; increased from 11.6% (2001–2004) to 13.2% (2009–2012) at the national level and in young adults, non-Hispanic blacks (NHBs) and non-users of iodine-containing supplements (all, p?<0.05); the adjusted odds ratios (95%CI) in young adults (1.54 [1.11–2.15], p =?0.0007) and NHBs (1.70 [1.15–2.52], p =?0.0078). Median UICs confirm women and NHBs being in borderline iodine status. Recognizing the critical consequence of iodine deficiency particularly in women and NHBs, regular monitoring of iodine status is important for public health in the US. 相似文献
16.
17.
18.
Rationale:The prone position is commonly used in spinal surgery. There have been many studies on hemodynamic changes in the prone position during general anesthesia. We report a rare case of transient left bundle branch block (LBBB) in a prone position.Patient concern:Electrocardiogram (ECG) of a 64-year-old man scheduled for spinal surgery showed normal sinus rhythm change to LBBB after posture change to the prone position.Diagnosis:Twelve lead ECG revealed LBBB. His coronary angio-computed tomography results showed right coronary artery with 30% to 40% stenosis and left circumflex artery with 40% to 50% stenosis. The patient was diagnosed with stable angina and second-degree atrioventricular block of Mobitz type II.Intervention:Nitroglycerin was administered intravenously during surgery. Adequate oxygen was supplied to the patient. After surgery, the patient was prescribed clopidogrel, statins, angiotensin II receptor blocker, and a permanent pacemaker was inserted.Outcome:Surgery was completed without complications. After surgery, the transient LBBB changed to a normal sinus rhythm. The patient did not complain of chest pain or dyspnea.Lesson:The prone position causes significant hemodynamic changes. A high risk of cardiovascular disease may cause ischemic heart disease and ECG changes. Therefore, careful management is necessary. 相似文献
19.
L. Matsuoka T. Shah S. Aswad S. Bunnapradist Y. Cho R. G. Mendez R. Mendez R. Selby 《American journal of transplantation》2006,6(6):1473-1478
The use of expanded criteria donors (ECD) has been proposed to help combat the discrepancy between organ availability and need. ECD kidneys are associated with delayed graft function (DGF) and worse long-term survival. The aim of this study is to evaluate the impact of pulsatile perfusion (PP) on DGF and graft survival in transplanted ECD kidneys. From January 2000 to December 2003, 4618 ECD kidney-alone transplants were reported to the United Network for Organ Sharing. PP was performed on 912 renal allografts. The prognostic factors of DGF were analyzed using multivariate logistic regression analysis. Risk factors for reduced allograft viability were greater in donors and recipients of PP kidneys. Three-year graft survival of ECD kidneys preserved with PP was similar to cold storage (CS) kidneys. The incidence of DGF in PP kidneys was significantly lower than CS kidneys (26% vs. 36%, p < 0.001). Despite having a greater number of risk factors for reduced graft viability, the ECD-PP kidneys had similar graft survival compared to ECD-CS kidneys. The use of PP, by decreasing the incidence of DGF, may possibly lead to lower overall costs and increased utilization of donor kidneys. 相似文献
20.
Jung Yong Ahn In Bo Han Chang Ki Hong Jin Yang Joo 《Journal of clinical neuroscience》2006,13(8):872-875
Ruptured aneurysms of the distal anterior choroidal artery (AchA) are extremely rare and management is dictated by clinical presentation. This report describes a rare patient with a distal AchA aneurysm and subarachnoid and intraventricular haemorrhage. A 60-year-old woman presented with a sudden onset of severe headache and vomiting. No aneurysms could be found on initial angiograms. A repeat angiogram performed 10 days after admission demonstrated an aneurysm in a branch of the cisternal segment of the left AchA without a definite neck. Surrounding vessels showed multifocal stricture and dilatation. Microsurgical clipping was not performed because the patient died suddenly due to pulmonary failure. The aetiology of the aneurysm in this case and surgical strategy are discussed. 相似文献