全文获取类型
收费全文 | 1518730篇 |
免费 | 120549篇 |
国内免费 | 7728篇 |
专业分类
耳鼻咽喉 | 19330篇 |
儿科学 | 48064篇 |
妇产科学 | 42056篇 |
基础医学 | 209665篇 |
口腔科学 | 41743篇 |
临床医学 | 133674篇 |
内科学 | 314247篇 |
皮肤病学 | 36204篇 |
神经病学 | 123330篇 |
特种医学 | 60410篇 |
外国民族医学 | 278篇 |
外科学 | 233947篇 |
综合类 | 36343篇 |
现状与发展 | 2篇 |
一般理论 | 469篇 |
预防医学 | 123492篇 |
眼科学 | 32394篇 |
药学 | 108502篇 |
5篇 | |
中国医学 | 3175篇 |
肿瘤学 | 79677篇 |
出版年
2018年 | 17485篇 |
2017年 | 13278篇 |
2016年 | 15320篇 |
2015年 | 17198篇 |
2014年 | 23444篇 |
2013年 | 35020篇 |
2012年 | 44602篇 |
2011年 | 47541篇 |
2010年 | 29131篇 |
2009年 | 27629篇 |
2008年 | 43659篇 |
2007年 | 46571篇 |
2006年 | 47482篇 |
2005年 | 45742篇 |
2004年 | 43581篇 |
2003年 | 42110篇 |
2002年 | 39807篇 |
2001年 | 73488篇 |
2000年 | 75612篇 |
1999年 | 62977篇 |
1998年 | 18597篇 |
1997年 | 16373篇 |
1996年 | 16978篇 |
1995年 | 17081篇 |
1994年 | 15862篇 |
1993年 | 14871篇 |
1992年 | 51070篇 |
1991年 | 49677篇 |
1990年 | 47559篇 |
1989年 | 45370篇 |
1988年 | 42187篇 |
1987年 | 41441篇 |
1986年 | 39000篇 |
1985年 | 37715篇 |
1984年 | 28503篇 |
1983年 | 23955篇 |
1982年 | 14839篇 |
1981年 | 13289篇 |
1980年 | 12503篇 |
1979年 | 25631篇 |
1978年 | 18328篇 |
1977年 | 15442篇 |
1976年 | 14235篇 |
1975年 | 15033篇 |
1974年 | 17725篇 |
1973年 | 17046篇 |
1972年 | 15756篇 |
1971年 | 14481篇 |
1970年 | 13283篇 |
1969年 | 12465篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
A. AbuKaraky M. Al Mousa O.A. Samara Z.H. Baqain 《International journal of oral and maxillofacial surgery》2021,50(6):798-800
Pseudoaneurysms in the external carotid artery system are rare, mostly reported in the superficial temporal and facial arteries. The bilateral sagittal split osteotomy has a low incidence of complications requiring emergency interventions. We report the case of a patient with acute bleeding from a pseudoaneurysm of the inferior alveolar artery diagnosed by angiography and treated successfully by super-selective embolization. 相似文献
83.
Laurie Lovett Novak Jonathan Wanderer David A. Owens Daniel Fabbri Julian Z. Genkins Thomas A. Lasko 《Applied clinical informatics》2021,12(1):164
Background The data visualization literature asserts that the details of the optimal data display must be tailored to the specific task, the background of the user, and the characteristics of the data. The general organizing principle of a concept-oriented display is known to be useful for many tasks and data types. Objectives In this project, we used general principles of data visualization and a co-design process to produce a clinical display tailored to a specific cognitive task, chosen from the anesthesia domain, but with clear generalizability to other clinical tasks. To support the work of the anesthesia-in-charge (AIC) our task was, for a given day, to depict the acuity level and complexity of each patient in the collection of those that will be operated on the following day. The AIC uses this information to optimally allocate anesthesia staff and providers across operating rooms. Methods We used a co-design process to collaborate with participants who work in the AIC role. We conducted two in-depth interviews with AICs and engaged them in subsequent input on iterative design solutions. Results Through a co-design process, we found (1) the need to carefully match the level of detail in the display to the level required by the clinical task, (2) the impedance caused by irrelevant information on the screen such as icons relevant only to other tasks, and (3) the desire for a specific but optional trajectory of increasingly detailed textual summaries. Conclusion This study reports a real-world clinical informatics development project that engaged users as co-designers. Our process led to the user-preferred design of a single binary flag to identify the subset of patients needing further investigation, and then a trajectory of increasingly detailed, text-based abstractions for each patient that can be displayed when more information is needed. 相似文献
84.
Turnbull Chris D. Stockley James A. Madathil Shyam Huq Syed S. A. Cooper Brendan G. Ali Asad Wharton Simon Stradling John R. Heitmar Rebekka 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2022,260(7):2129-2139
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases.... 相似文献
85.
86.
T.F.A. Lees L. Bogdashich D. Godden 《The British journal of oral & maxillofacial surgery》2021,59(1):e9-e12
Fibroepithelial polyps (FEPs) are common, benign intraoral lesions that tend to develop slowly at predictable sites, often in response to local irritation or trauma. Historical precedent often results in referral to oral and maxillofacial surgery (OMFS) departments for biopsy, often irrespective of symptoms, and histological assessment. OMFS and pathology services are struggling to cope with an increasing workload that will potentially lead to widespread delays to diagnosis and treatment. Over the past 20 years, clinical pathways and guidance have been developed to ensure that healthcare interventions, such as the removal of third molars, tonsils, skin tags, and benign moles, are evidence-based, have a net patient benefit, and ensure the best use of finite NHS resources. However, no such guidance exists for intraoral lesions and we regard this as an oversight. We analysed the removal of 682 FEPs over a seven-year period and report sensitivities of 92.4% for a “confirmed clinical suspicion of an FEP” and 99.7% for a “confirmed clinical suspicion of a benign diagnosis”. The incidence of non-benign disease was 0.3%. Primary care dentists should be able to diagnose and monitor FEPs and refer only if symptoms are serious or in high-risk patients or sites. Adopting this practice across the UK could free up to 1825 four-hour OMFS clinics, 405 hours of consultant histopathologists’ time, and recurring savings to the NHS estimated to be in the region of £620 000/annum. We believe that the removal of FEPs should be reclassified as an “intervention not normally funded”, and the time and resources put to better use treating patients with lesions of questionable pathology. 相似文献
87.
Estefany I. Medina-Reyes Carolina Rodríguez-Ibarra Daniel Díaz-Urbina Alejandro Déciga-Alcaraz Normal L. Delgado-Buenrostro Yolanda I. Chirino José Pedraza-Chaverri 《Journal of applied toxicology : JAT》2022,42(8):1411-1419
Food-grade titanium dioxide (E171) is widely used as a food additive, and it is known that after oral consumption, E171 is translocated into the bloodstream reaching the highest titanium level at 6 h. E171 is accumulated in some organs triggering toxicity, but the effects on the blood parameters after oral consumption have been less studied. Recently, evidence shows that oral exposure to E171 induces behavioral signs of anxiety and depression. The relation between blood alterations and psychiatric disorders has been previously demonstrated. However, the oral exposure to E171 effects on alterations in blood parameters and effects linked to alterations in animal behavior has not been explored. In this short communication, we aimed to investigate the effects of E171 on specific blood parameters (hematocrit, hemoglobin, number of erythrocytes, and leukocytes) and anxiety and compulsive-like behavior in males and females orally exposed to ~5 mg/kg for 4 weeks. The results showed that E171 decreased hematocrit and hemoglobin in male but not in female mice while leukocyte and erythrocyte count remained unaltered. Oral consumption of E171 decreased the levels of anxiety-like behavior in females but not in male mice, while compulsive-like behavior was increased in both male and female mice. 相似文献
88.
89.
90.