全文获取类型
收费全文 | 28994篇 |
免费 | 6578篇 |
国内免费 | 157篇 |
专业分类
耳鼻咽喉 | 734篇 |
儿科学 | 808篇 |
妇产科学 | 912篇 |
基础医学 | 1592篇 |
口腔科学 | 2780篇 |
临床医学 | 4889篇 |
内科学 | 6858篇 |
皮肤病学 | 562篇 |
神经病学 | 2576篇 |
特种医学 | 1236篇 |
外科学 | 4919篇 |
综合类 | 165篇 |
现状与发展 | 13篇 |
一般理论 | 14篇 |
预防医学 | 3369篇 |
眼科学 | 538篇 |
药学 | 651篇 |
中国医学 | 14篇 |
肿瘤学 | 3099篇 |
出版年
2024年 | 138篇 |
2023年 | 1172篇 |
2022年 | 525篇 |
2021年 | 917篇 |
2020年 | 1379篇 |
2019年 | 769篇 |
2018年 | 1621篇 |
2017年 | 1462篇 |
2016年 | 1694篇 |
2015年 | 1792篇 |
2014年 | 2249篇 |
2013年 | 2773篇 |
2012年 | 1288篇 |
2011年 | 1310篇 |
2010年 | 1620篇 |
2009年 | 2229篇 |
2008年 | 1174篇 |
2007年 | 992篇 |
2006年 | 1057篇 |
2005年 | 894篇 |
2004年 | 779篇 |
2003年 | 694篇 |
2002年 | 644篇 |
2001年 | 447篇 |
2000年 | 329篇 |
1999年 | 444篇 |
1998年 | 575篇 |
1997年 | 548篇 |
1996年 | 587篇 |
1995年 | 446篇 |
1994年 | 354篇 |
1993年 | 311篇 |
1992年 | 211篇 |
1991年 | 187篇 |
1990年 | 170篇 |
1989年 | 186篇 |
1988年 | 162篇 |
1987年 | 169篇 |
1986年 | 127篇 |
1985年 | 120篇 |
1984年 | 112篇 |
1983年 | 122篇 |
1982年 | 115篇 |
1981年 | 96篇 |
1980年 | 69篇 |
1979年 | 54篇 |
1978年 | 57篇 |
1977年 | 68篇 |
1976年 | 59篇 |
1974年 | 49篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
82.
83.
Shirley L. Jones RNC MS 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1996,25(9):777-783
Advances in human genetics are rapidly changing the scope of information and care that can be provided to health care consumers. By the year 2005 it is expected that the entire human genome will be mapped and all 70,000–100,000 genes will be identified. Currently, there are more than 5,000 known single-gene disorders. With the movement of specialized health services into the primary care setting, nurses increasingly will need to be knowledgeable about genetic disorders, screening/diagnostic tests, and implications for health care. In addition, the management of genetic information raises issues of informed consent, privacy and confidentiality, truth telling and disclosure, and nondiscrimination. 相似文献
84.
85.
Anna Plachcinska Jacek Kusmierek Maciej Kosmider Malgorzata Bienkiewicz Julian Liniecki 《European journal of nuclear medicine and molecular imaging》1995,22(3):193-200
A quantified evaluation of planar cardiac perfusion scintigrams (the objective of the study), obtained using technetium-99m methoxyisobutylisonitrile (MIBI) was performed on the basis of an analysis of circumferential profile curves, representing the perfusion as seen in three typical projections. The analysis involved the curves obtained both at rest and after stress, and was based on a comparison of their shape (trend) with the normal trend (normative evaluation). The latter was obtained by means of an original method of iterative fitting of individual curves into the database. The base consisted of curves recorded in 53 patients (separately in males and females) with normal perfusion of the left ventricle (group I, the reference group). A group of 90 patients suspected of having coronary artery disease (group II) was subdivided into two subgroups on the basis of coronary arteriography: (a) those with and (b) those without critical stenosis of at least one artery. Profile curves characterising the LV perfusion were obtained at rest and after stress. Defects of perfusion were quantified by comparison of individual curves with the normal trends. By means of multivariate analysis it was demonstrated that vectors of mean values characterising the scintigraphically assessed defects of LV perfusion in the two subgroups of group II differed very significantly (P<10–5). Applying methods of discriminant analysis, a classification of patients from group II was performed into those with probable defects of perfusion and those free of such defects. The sensitivity, specificity and accuracy of diagnosis of coronary ischaemia, based on quantified planar99mTc-MIBI scintigraphy, reached 86%, 87% and 87%, respectively. 相似文献
86.
Dr Arthur J. L. Schneider MD W. Bosseau Murray MBChB MD Steven C. Mentzer BS Fernando Miranda BS Sorin Vaduva MS 《Journal of clinical monitoring and computing》1995,11(6):358-364
Objective. The medical practitioner is faced with an increasing list of protocols and algorithms related to patient care. These recommendations are often difficult to recall, particularly in stressful emergency situations. Using advanced cardiac life support (ACLS) protocols, we built a computer-based system to exhibit precompiled response plans for medical emergencies. To validate the usefulness of this prompting device, we tested application of two of the nine ACLS algorithms, pulseless ventricular fibrillation/ventricular tachycardia (Vfib/Vtach) and bradycardia, in a simulated operating room (OR) environment.Methods. The system utilized the software authoring system IconAuthor (Aimtec Inc., Nashua, NH) and a touch-screen monitor (DiamondScan, Microtouch, Methuen, MA). Prior to testing our system, all 39 subjects were given time to familiarize themselves with its operation. Subsequently, all subjects were videotaped while managing a standard simulated anesthetic. During the anesthetic, the subjects were presented with two emergency scenarios, not viewed during the familiarization period. The electrocardiographic (EKG) signals for normal sinus rhythm, ventricular fibrillation, and second-degree heart block were presented. By random selection, the prompter was available to half of the subjects for help with arrhythmia management (experimental group), while to half it was not (control group).Results. A total of 39 subjects completed the exercise. Use of the prompter enabled significantly more subjects to administer correct drugs and dosages during ventricular fibrillation. The correct lidocaine dose was chosen more often by the experimental group than by the control (p=0.015); similarly MgSO4 was appropriately ordered more often in the experimental group (p=0.003). During second-degree heart block, atropine was correctly followed with a dopamine infusion (p=0.004), and epinephrine infusion was ordered for refractory bradycardia (p=0.002) more often in the experimental than the control group.Conclusions. These data demonstrate the value of a prompting device at the anesthesia workstation. We foresee the use of such prompters in many areas of medicine.This study was made possible by a grant from the Anesthesia Patient Safety Foundation. Results were presented, in part, at the meeting of the STA/SEA Orlando, Florida, January 1994. 相似文献
87.
88.
Andrew R. Hoellein MD Christopher A. Feddock MD Charles H. Griffith III MD MSPH John F. Wilson PhD Donald R. Barnett MD MSPH Pat F. Bass III MD MS T. Shawn Caudill MD MSPH 《Journal of general internal medicine》2004,19(5P2):562-565
Due to recent public debate and newly imposed resident work hour restrictions, we decided to investigate the relationship of resident call status to their ambulatory patients' satisfaction. Resident continuity clinic patients were asked to rate their level of satisfaction on a 10-point Likert-type scale. Using multiple regression approaches, these data were then assessed as a function of resident call status. We found that in 646 patient encounters, patient satisfaction scores were significantly less when the resident was postcall, 8.99 ± 1.8, than when not postcall, 9.31 ± 1.3. We herein discuss etiologies and implications of these findings for both patient care and medical education. 相似文献
89.
90.