全文获取类型
收费全文 | 59261篇 |
免费 | 3839篇 |
国内免费 | 114篇 |
专业分类
耳鼻咽喉 | 594篇 |
儿科学 | 2396篇 |
妇产科学 | 1709篇 |
基础医学 | 7560篇 |
口腔科学 | 598篇 |
临床医学 | 8876篇 |
内科学 | 10283篇 |
皮肤病学 | 878篇 |
神经病学 | 5715篇 |
特种医学 | 1123篇 |
外科学 | 5134篇 |
综合类 | 610篇 |
一般理论 | 109篇 |
预防医学 | 7924篇 |
眼科学 | 839篇 |
药学 | 3913篇 |
中国医学 | 61篇 |
肿瘤学 | 4892篇 |
出版年
2023年 | 272篇 |
2022年 | 378篇 |
2021年 | 1055篇 |
2020年 | 727篇 |
2019年 | 1097篇 |
2018年 | 1248篇 |
2017年 | 1027篇 |
2016年 | 1120篇 |
2015年 | 1298篇 |
2014年 | 1790篇 |
2013年 | 2827篇 |
2012年 | 4062篇 |
2011年 | 4406篇 |
2010年 | 2474篇 |
2009年 | 2242篇 |
2008年 | 3995篇 |
2007年 | 4263篇 |
2006年 | 4112篇 |
2005年 | 4220篇 |
2004年 | 4030篇 |
2003年 | 3774篇 |
2002年 | 3498篇 |
2001年 | 608篇 |
2000年 | 521篇 |
1999年 | 595篇 |
1998年 | 728篇 |
1997年 | 664篇 |
1996年 | 525篇 |
1995年 | 522篇 |
1994年 | 450篇 |
1993年 | 375篇 |
1992年 | 346篇 |
1991年 | 300篇 |
1990年 | 270篇 |
1989年 | 272篇 |
1988年 | 243篇 |
1987年 | 216篇 |
1986年 | 213篇 |
1985年 | 225篇 |
1984年 | 224篇 |
1983年 | 226篇 |
1982年 | 237篇 |
1981年 | 237篇 |
1980年 | 178篇 |
1979年 | 136篇 |
1978年 | 140篇 |
1977年 | 79篇 |
1976年 | 78篇 |
1975年 | 68篇 |
1974年 | 92篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Daniel J Weiss Amelia Bertozzi-Villa Susan F Rumisha Punam Amratia Rohan Arambepola Katherine E Battle Ewan Cameron Elisabeth Chestnutt Harry S Gibson Joseph Harris Suzanne Keddie Justin J Millar Jennifer Rozier Tasmin L Symons Camilo Vargas-Ruiz Simon I Hay David L Smith Pedro L Alonso Peter W Gething 《The Lancet infectious diseases》2021,21(1):59-69
992.
Terence M. Davidson Susan F. Schafer Mark D. Bracker 《The Physician and sportsmedicine》2013,41(4):160-167
In brief: Rattlesnake bites are rarely fatal, but prevention is the best treatment. People who live in areas indigenous to rattlesnakes should take routine precautionary measures such as wearing boots and long pants. A person who encounters or is bitten by a snake should get away from it as soon as possible. First aid includes applying a constricting band and suction; incisions are not recommended. The victim should be transported to a medical facility as soon as possible. Medical management includes a history and physical examination and laboratory data, including blood coagulation studies and urinalysis. Intravenous antivenom is the mainstay of treatment. 相似文献
993.
994.
This study examined balance ability, lower-extremity muscle strength, fear of falling and their inter-relationships in 40 community-dwelling older adults (>65 years). Subjects who self-identified either as being fearful offalling or not (no concern) were screened to exclude those with known risk factors for falling. Limits of stability, maximal isometric strength, gait speed, and fear of falling were contrasted between groups (27 control subjects, 13 fearful subjects). Those fearful of falling demonstrated smaller center of pressure (COP) excursions in anterior, left, and right directions ( p <.0001) and used a smaller percentage of their base of support during maximal weight shifting in combined anterior-posterior and right-left directions ( p <.001) compared to the control group. Strength did not differ between groups, but was associated with the ability to shift the COP in the anterior-posterior direction ( p <.05). Fear of falling also related to weight shifting ability ( p <.017). Seniors fearful of falling demonstrated limitations in balance ability and balance confidence that could not be explained by muscle weakness. 相似文献
995.
996.
Jefferson AL Carmona H Gifford KA Lambe S Byerly LK Cantwell NG Tripodis Y Karlawish J 《The American journal of geriatric psychiatry》2012,20(10):878-886
OBJECTIVE:: To determine whether individuals with mild cognitive impairment (MCI) differ from cognitively normal (NC) elders on a risk assessment task and whether participants and their study partners evaluate risk and benefit similarly. DESIGN:: Cross-sectional. SETTING:: University medical setting. PARTICIPANTS:: Seventy-nine participants (NC, n = 40; MCI, n = 39), age 60-90 years (73 ± 7 years; 53% women), and 64 study partners (NC, n = 36; MCI, n = 28), age 38-84 years (68 ± 10 years; 67% women). MEASUREMENTS:: Participants and study partners completed a risk assessment task that involved ranking from least to most risk four hypothetical vignettes for memory loss research (brain autopsy, blood draw, oral medication, neurosurgery). Participants also completed decisional capacity for research and neuropsychological protocols. RESULTS:: MCI participants' risk rankings differed from NC risk rankings (p <0.001) with MCI participants ranking brain autopsy higher and an oral medication trial lower. Demographic, decisional capacity, and neuropsychological variables could not explain MCI participant performances. Participants and their study partners had comparable risk assessment performance (p = 1.0). MCI study partners performed similar to their MCI participant counterparts but were different from NC study partners (p = 0.002; i.e., ranking autopsy higher and oral medication lower). CONCLUSION:: Findings suggest that individuals with MCI assess risk differently than NC peers by overestimating the risk (or underestimating the benefit) of brain autopsy and underestimating the risk (or overestimating the benefit) of oral medication. Study partners display a similar pattern. These observations may be secondary to MCI participants' (and their study partners') personal connection to the potential benefits of an experimental medication for memory loss. 相似文献
997.
How can group‐based multidisciplinary rehabilitation for patients with fibromyalgia influence patients' self‐efficacy and ability to cope with their illness: a grounded theory approach 下载免费PDF全文
998.
999.
1000.