全文获取类型
收费全文 | 221109篇 |
免费 | 3911篇 |
国内免费 | 258篇 |
专业分类
耳鼻咽喉 | 1716篇 |
儿科学 | 8007篇 |
妇产科学 | 4097篇 |
基础医学 | 21178篇 |
口腔科学 | 3066篇 |
临床医学 | 16320篇 |
内科学 | 40764篇 |
皮肤病学 | 1606篇 |
神经病学 | 19082篇 |
特种医学 | 10448篇 |
外国民族医学 | 9篇 |
外科学 | 36875篇 |
综合类 | 3464篇 |
现状与发展 | 3篇 |
一般理论 | 35篇 |
预防医学 | 21123篇 |
眼科学 | 4368篇 |
药学 | 13280篇 |
2篇 | |
中国医学 | 1038篇 |
肿瘤学 | 18797篇 |
出版年
2023年 | 477篇 |
2022年 | 1170篇 |
2021年 | 2240篇 |
2020年 | 1341篇 |
2019年 | 1751篇 |
2018年 | 23650篇 |
2017年 | 18576篇 |
2016年 | 20845篇 |
2015年 | 2625篇 |
2014年 | 2993篇 |
2013年 | 3422篇 |
2012年 | 10860篇 |
2011年 | 24612篇 |
2010年 | 20883篇 |
2009年 | 13203篇 |
2008年 | 22069篇 |
2007年 | 24301篇 |
2006年 | 3071篇 |
2005年 | 4408篇 |
2004年 | 5348篇 |
2003年 | 5955篇 |
2002年 | 3923篇 |
2001年 | 806篇 |
2000年 | 866篇 |
1999年 | 584篇 |
1998年 | 457篇 |
1997年 | 370篇 |
1996年 | 269篇 |
1995年 | 248篇 |
1994年 | 235篇 |
1993年 | 180篇 |
1992年 | 250篇 |
1991年 | 328篇 |
1990年 | 326篇 |
1989年 | 272篇 |
1988年 | 202篇 |
1987年 | 196篇 |
1986年 | 159篇 |
1985年 | 188篇 |
1984年 | 134篇 |
1983年 | 95篇 |
1982年 | 99篇 |
1981年 | 84篇 |
1980年 | 105篇 |
1979年 | 92篇 |
1978年 | 74篇 |
1977年 | 58篇 |
1975年 | 66篇 |
1974年 | 74篇 |
1938年 | 65篇 |
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
71.
Bagher Larijani Alireza Moayyeri Abbas Ali Keshtkar Arash Hossein-Nezhad Akbar Soltani Amir Bahrami Gholam Hossein Omrani Reza Rajabian Iraj Nabipour 《Journal of clinical densitometry》2006,9(3):367-374
Osteoporosis is a major public health problem in the Western countries and is projected to have a similar impact in the Middle East. It has been suggested that peak bone mineral density (BMD), a major determinant of osteoporotic fractures later in life, may be lower in this part of the world compared with the Western world. The purpose of the Iranian Multicenter Osteoporosis Study was to determine peak bone mass in a randomly chosen sample of healthy Iranian subjects. A total of 5201 participants (2340 males, mean age 42.7+/-13.8) were recruited based on randomized clustered sampling from all regions of five major cities across the country. In women, peak lumbar BMD (1.182+/-0.127 g/cm2) occurred in the 29- to 33-yr age group, whereas peak total femur BMD (1.006+/-0.126 g/cm2) occurred in the 32- to 36-yr age group. In men, peak lumbar BMD (1.181+/-0.153 g/cm2) and femoral BMD (1.096+/-0.159 g/cm2) both occurred in the 20- to 24-yr age group. When standardized to mg/cm2 units using established formulas, Iranian peak bone mass values are comparable with that of Western countries and are generally higher than that of Eastern Asian and Middle Eastern countries. 相似文献
72.
Susanne Ramsauer 《Zeitschrift für Psychodrama und Soziometrie》2007,6(2):293-302
Anliegen dieses Artikels ist, die besondere Qualit?t und Chance von Psychodramatischer Supervision zu beschreiben, und gleichzeitig
die Kompatibilit?t und fruchtbare Erg?nzung des Moreno’schen Ansatzes innerhalb des Formats Supervision innerhalb der Sozialen
Arbeit auf zuzeigen. Dies wird anhand von 2 ausgew?hlten Praxisbeispielen dargestellt. Die Handlungskompetenz von Supervisandinnen
und Supervisanden kann durch einfache psychodramatische Interventionen erweitert werden. Handlungshemmung wird überwunden,
Spontaneit?t und Kreativit?t kommen ins Laufen und er?ffnen Perspektiven. 相似文献
73.
74.
75.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献
76.
杨娅 Thomas Bartel Loredana Latina Guido Caspari 王新房 Raimund Erbel 《华中科技大学学报(医学英德文版)》2002,22(2):158-163
Coronary flow reserve (CFR) has been used toassess coronary microcirculation and epicardial coro-nary stenoses[1— 3 ] . CFR is defined as the ratio ofcoronary flow under maximal coronary vasodilatationto coronary flow under resting conditions[4 ] .Whenthe cross- sectional area of epicardial coronary arteriesis constant,coronary flow velocity (CFV) ratios areequal to volume flow ratios.The most common method used clinically formeasuring CFVR is intracoronary Doppler flow(ICD) analysis re… 相似文献
77.
78.
79.
T. M. Skerry M.D. M.R.C.V.S. R. Suswillo A. J. El Haj N. N. Ali R. A. Dodds L. E. Lanyon 《Calcified tissue international》1990,46(5):318-326
Summary Previous studies of Alcian blue-induced birefringence in adult avian cortical bone showed that a short period of intermittent
loading rapidly produces an increased level of orientation of proteoglycans within the bone tissue. In the absence of further
loading, this persists for over 24 hours. We have proposed that this phenomenon could provide a means for “capturing” the
effects of transient strains, and so provide a persistent, constantly updated strain-related influence on osteocyte populations
related to the bones' averaged recent strain history, in effect, a “strain memory” in bone tissue. In our present study, we
use the Alcian blue-induced birefringence technique to demonstrate that proteoglycan orientation also occurs after intermittent
loading of both cortical and cancellous mammalian bonein vivo andin vitro. We also show that the change in birefringence is proportional to the magnitude of the applied strain, and that the reorientation
occurs rapidly, reaching a maximal value after only 50 loading cycles. Examination of electron micrographs of bone tissue
after staining with cupromeronic blue allows direct visualization and quantification of the change in proteoglycan orientation
produced by loading. This shows that intermittent loading is associated with a realignment of the proteoglycan protein cores,
bringing them some 5 degrees closer to the direction of collagen fibrils in the bone matrix. 相似文献
80.
Irwin L. Flink 《Brain structure & function》2002,205(3):235-244