全文获取类型
收费全文 | 4581篇 |
免费 | 315篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 71篇 |
儿科学 | 206篇 |
妇产科学 | 72篇 |
基础医学 | 533篇 |
口腔科学 | 125篇 |
临床医学 | 558篇 |
内科学 | 962篇 |
皮肤病学 | 70篇 |
神经病学 | 395篇 |
特种医学 | 444篇 |
外科学 | 458篇 |
综合类 | 70篇 |
一般理论 | 1篇 |
预防医学 | 331篇 |
眼科学 | 81篇 |
药学 | 303篇 |
中国医学 | 3篇 |
肿瘤学 | 228篇 |
出版年
2021年 | 58篇 |
2020年 | 35篇 |
2019年 | 55篇 |
2018年 | 81篇 |
2017年 | 56篇 |
2016年 | 46篇 |
2015年 | 68篇 |
2014年 | 107篇 |
2013年 | 133篇 |
2012年 | 198篇 |
2011年 | 212篇 |
2010年 | 121篇 |
2009年 | 123篇 |
2008年 | 187篇 |
2007年 | 211篇 |
2006年 | 180篇 |
2005年 | 169篇 |
2004年 | 180篇 |
2003年 | 145篇 |
2002年 | 155篇 |
2001年 | 174篇 |
2000年 | 153篇 |
1999年 | 138篇 |
1998年 | 140篇 |
1997年 | 107篇 |
1996年 | 110篇 |
1995年 | 84篇 |
1994年 | 85篇 |
1993年 | 100篇 |
1992年 | 87篇 |
1991年 | 83篇 |
1990年 | 75篇 |
1989年 | 97篇 |
1988年 | 73篇 |
1987年 | 82篇 |
1986年 | 56篇 |
1985年 | 82篇 |
1984年 | 51篇 |
1983年 | 49篇 |
1982年 | 46篇 |
1981年 | 50篇 |
1980年 | 54篇 |
1979年 | 41篇 |
1978年 | 42篇 |
1977年 | 29篇 |
1976年 | 37篇 |
1975年 | 33篇 |
1974年 | 29篇 |
1973年 | 28篇 |
1972年 | 24篇 |
排序方式: 共有4911条查询结果,搜索用时 62 毫秒
1.
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
2.
3.
Needle-localized breast biopsy: why do we fail? 总被引:10,自引:0,他引:10
4.
BackgroundThe incidence of strictures developing after gastrojejunostomy has been reported to range from 3% to 31%. We found an unacceptably high stricture rate (13%) using a 21-mm circular stapler. Attempts to use the 25-mm circular stapler were frustrated by disparities between the size of the instrument and the patient's anatomy. We, therefore, modified the technique to accomplish the anastomosis with the linear stapler and hand sewing (LSA) at community hospitals in Southern California.MethodsA total of 124 anastomoses were accomplished with the circular stapler (CSA) followed by 100 anastomoses using the LSA technique. Drains were used routinely with the CSA technique but were used only selectively with the LSA technique. Stricture was defined as that requiring endoscopic dilation for symptoms. Leaks were confirmed radiologically or surgically, and bleeding was defined as the need for transfusion. Our analysis used the Student t test and Fisher's exact test, with P <.05 considered statistically significant.ResultsNo patient died. The LSA technique was faster and resulted in significantly fewer postoperative strictures and complications compared with the CSA technique.ConclusionThe results of our study have shown that the LSA technique, as described, is preferable to the CSA technique. 相似文献
5.
Ketai LH; Williamson MR; Telepak RJ; Levy H; Koster FT; Nolte KB; Allen SE 《Radiology》1994,191(3):665
6.
Karen A Luker PhD BNurs RGN RHV NDNCert Kinta Beaver BA RGN DPSN Samuel J Leinster BSc MD FRCS R Glynn Owens BTech DipPsych DPhil AFBPsS Lesley F Degner PhD RN Jeffrey A Sloan PhD BSc 《Journal of advanced nursing》1995,22(1):134-141
Nurses can play a key role in patient education, including providing patients with useful and approrate information Rather than focusing on the process of education or information giving by nurses, this study places emphasis on the content of that information by taking the patients'perspective and asking the patients themselves what particular types of information are perceived as important at a specific point in time The aim of the study was to explore what particular types of information were important to women newly diagnosed with breast cancer, to enable nurses and other health care professionals to utilize their time as effectively as possible and provide a high-quality service to individuals in their care Women with breast cancer (a mean of 2 5 weeks from diagnosis) were interviewed and asked to compare items of information The items of information were presented m pairs and the women stated a preference for one item in that pan- Thirty-six pairs were presented in total The analysis involved the use of a Thurstone scaling model, which allowed rank ordermgs, or profiles of information needs, to be developed, reflecting the perceived importance of each item Information about the likelihood of cure, the spread of the disease and treatment options were perceived as the most important items of information at the tune of diagnosis Other information needs, in order of descending priority, included information about the risk to family, side-effects 相似文献
7.
Systemic sclerosis secondary to occupational exposure 总被引:1,自引:0,他引:1
8.
9.
Ethnic factors in voluntary and compulsory admissions 总被引:1,自引:0,他引:1
Socio-demographic and clinical aspects of compulsory and informal admissions to general adult psychiatry wards over a two-year period are compared. In addition, Afro-Caribbean patients are compared with white UK-born patients. Relative rates of admission are examined. The study confirms other reports of greater than expected compulsory admissions of Afro-Caribbean patients and pays particular attention to the circumstances preceding compulsory entry to hospital and the persons and agencies involved in that process. 相似文献
10.
荧光原位杂交技术分析人结肠菌群方法研究 总被引:2,自引:0,他引:2
建立荧光原位杂交技术分析人体内结肠菌群的方法。取受试者新鲜粪便 ,选用 5种特异性的 16SrRNA寡核苷酸探针 ,检测粪便样本收集后的保存时间、温度 ,离心条件及样本固定液存放时间对杂交计数结果的影响。结果建立最佳实验条件为 :粪便样本收集后应尽快在 4℃下保存 ,放置时间不要超过 12小时即作处理 ;样本的适宜离心条件为 70 0g 2分钟 ;样本用多聚甲醛固定后在 - 80℃下存放时间不要超过 5个月。该方法具有较好的稳定性 ,可以有效地检出个体之间结肠菌群的差异。 相似文献