全文获取类型
| 收费全文 | 1627260篇 |
| 免费 | 132799篇 |
| 国内免费 | 6669篇 |
专业分类
| 耳鼻咽喉 | 24122篇 |
| 儿科学 | 54314篇 |
| 妇产科学 | 42473篇 |
| 基础医学 | 222767篇 |
| 口腔科学 | 41820篇 |
| 临床医学 | 165546篇 |
| 内科学 | 328361篇 |
| 皮肤病学 | 37597篇 |
| 神经病学 | 139402篇 |
| 特种医学 | 62232篇 |
| 外国民族医学 | 387篇 |
| 外科学 | 247159篇 |
| 综合类 | 29774篇 |
| 现状与发展 | 73篇 |
| 一般理论 | 503篇 |
| 预防医学 | 127608篇 |
| 眼科学 | 36033篇 |
| 药学 | 110431篇 |
| 6篇 | |
| 中国医学 | 3463篇 |
| 肿瘤学 | 92657篇 |
出版年
| 2021年 | 14816篇 |
| 2020年 | 13099篇 |
| 2019年 | 14748篇 |
| 2018年 | 25376篇 |
| 2017年 | 20877篇 |
| 2016年 | 23606篇 |
| 2015年 | 25765篇 |
| 2014年 | 38208篇 |
| 2013年 | 51040篇 |
| 2012年 | 57063篇 |
| 2011年 | 59358篇 |
| 2010年 | 40837篇 |
| 2009年 | 41350篇 |
| 2008年 | 55346篇 |
| 2007年 | 56923篇 |
| 2006年 | 59191篇 |
| 2005年 | 55479篇 |
| 2004年 | 52432篇 |
| 2003年 | 49243篇 |
| 2002年 | 48058篇 |
| 2001年 | 69428篇 |
| 2000年 | 70419篇 |
| 1999年 | 59788篇 |
| 1998年 | 19307篇 |
| 1997年 | 17543篇 |
| 1996年 | 16971篇 |
| 1995年 | 16008篇 |
| 1994年 | 14006篇 |
| 1993年 | 12918篇 |
| 1992年 | 44745篇 |
| 1991年 | 43941篇 |
| 1990年 | 42226篇 |
| 1989年 | 40185篇 |
| 1988年 | 37023篇 |
| 1987年 | 36023篇 |
| 1986年 | 34373篇 |
| 1985年 | 32667篇 |
| 1984年 | 24640篇 |
| 1983年 | 20917篇 |
| 1982年 | 12796篇 |
| 1979年 | 22285篇 |
| 1978年 | 15996篇 |
| 1977年 | 13150篇 |
| 1976年 | 12718篇 |
| 1975年 | 13287篇 |
| 1974年 | 15994篇 |
| 1973年 | 15590篇 |
| 1972年 | 14538篇 |
| 1971年 | 13479篇 |
| 1970年 | 12472篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
7.
Stephan Koter Tina U. Cohnert Korbinian B. Hindermayr Jörg Lindenmann Maximilian Brückner Wolfgang K. Oswald Georg Werkgartner Doris Wagner 《Journal of vascular surgery》2019,69(4):1227-1232
Objective
Low psoas muscle area is shown to be an indicator for worse postoperative outcome in patients undergoing vascular surgical. Additionally, it has been associated with longer durations of hospital stay in patients with cancer who undergo surgery and subsequently greater health care costs in Europe and the United States. We sought to evaluate this effect on hospital expenditure for patients undergoing vascular repair in a health care system with universal access.Methods
Skeletal muscle mass was assessed on preoperative abdominal computed tomography scans of patients undergoing open aortic aneurysm repair in a retrospective fashion. The skeletal muscle index (SMI) was used to define low muscle mass. Health care costs were obtained for all patients and the relationship between a low SMI and higher costs was explored using linear regression and cross-sectional analysis.Results
We included 156 patients (81.5% male) with a median age of 72 years undergoing elective surgery for infrarenal abdominal aortic aneurysm in this analysis. The median SMI for patients with low skeletal muscle mass was 53.21 cm2/kg and for patients without, 70.07 cm2/kg. Hospital duration of stay was 2 days longer in patients with low skeletal muscle mass as compared with patients with normal (14 days vs 11 days; P = .001), as was duration of intensive care stay (3 days vs 1 day; P = .01). The median overall hospital costs were €10,460 higher for patients with a low SMI as compared with patients with a normal physical constitution (€53,739 [interquartile range, €45,007-€62,471] vs €43,279 [interquartile range, €39,509-€47,049]; P = .001). After confounder adjustment, a low SMI was associated with a 14.68% cost increase in overall hospital costs, for a cost increase of €6521.Conclusions
Low skeletal muscle mass is independently associated with higher hospital as well as intensive care costs in patients undergoing elective aortic aneurysm repair. Strategies to reduce this risk factor are warranted for these patients. 相似文献8.
Megan L. Robbins Robert C. Wright Ana María López Karen Weihs 《Journal of psychosocial oncology》2019,37(2):160-177
AbstractObjectives: This study examined word use as an indicator of interpersonal positive reframing in daily conversations of couples coping with breast cancer and as a predictor of stress.Design: The Electronically Activated Recorder (EAR) and Linguistic Inquiry and Word Count (LIWC) were used to examine naturally occurring word use conceptually linked to positive reframing (positive emotion, negative emotion, and cognitive processing words).Sample: Fifty-two couples coping with breast cancer.Methods: Couples wore the EAR, a device participants wear, that audio-recorded over one weekend (>16,000 sound files), and completed self-reports of positive reframing (COPE) and stress (Perceived Stress Scale). LIWC, a software program, measured word use.Findings: Both partners’ word use (i.e., positive emotion and cognitive processing words) was associated with their own reported positive reframing, and spouses’ word use was also indicative of patients’ positive reframing. Results also revealed that, in general, words indicating positive reframing predicted lower levels of stress.Conclusions: Findings supported the hypothesis that partners—and particularly spouses of breast cancer patients—may assist each other’s coping by positively reframing the cancer experience and other negative experiences in conversation. 相似文献
9.
Jae Eun Choi Tyler Werbel Zhenping Wang Chia Chi Wu Tony L. Yaksh Anna Di Nardo 《Journal of dermatological science》2019,93(1):58-64
Background
Rosacea is a chronic inflammatory skin condition whose etiology has been linked to mast cells and the antimicrobial peptide cathelicidin LL-37. Individuals with refractory disease have demonstrated clinical benefit with periodic injections of onabotulinum toxin, but the mechanism of action is unknown.Objectives
To investigate the molecular mechanism by which botulinum toxin improves rosacea lesions.Methods
Primary human and murine mast cells were pretreated with onabotulinum toxin A or B or control. Mast cell degranulation was evaluated by β-hexosaminidase activity. Expression of botulinum toxin receptor Sv2 was measured by qPCR. The presence of SNAP-25 and VAMP2 was established by immunofluorescence. In vivo rosacea model was established by intradermally injecting LL-37 with or without onabotulinum toxin A pretreatment. Mast cell degranulation was assessed in vivo by histologic counts. Rosacea biomarkers were analyzed by qPCR of mouse skin sections.Results
Onabotulinum toxin A and B inhibited compound 48/80-induced degranulation of both human and murine mast cells. Expression of Sv2 was established in mouse mast cells. Onabotulinum toxin A and B increased cleaved SNAP-25 and decreased VAMP2 staining in mast cells respectively. In mice, injection of onabotulinum toxin A significantly reduced LL-37-induced skin erythema, mast cell degranulation, and mRNA expression of rosacea biomarkers.Conclusions
These findings suggest that onabotulinum toxin reduces rosacea-associated skin inflammation by directly inhibiting mast cell degranulation. Periodic applications of onabotulinum toxin may be an effective therapy for refractory rosacea and deserves further study. 相似文献10.
M. Iachina P.M. Ljungdalh R.G. Sørensen L. Kaerlev J. Blaakær O. Trosko N. Qvist B.M. Nørgård 《Clinical oncology (Royal College of Radiologists (Great Britain))》2019,31(2):115-123