全文获取类型
| 收费全文 | 1610261篇 |
| 免费 | 117910篇 |
| 国内免费 | 3113篇 |
专业分类
| 耳鼻咽喉 | 23229篇 |
| 儿科学 | 49992篇 |
| 妇产科学 | 43300篇 |
| 基础医学 | 240643篇 |
| 口腔科学 | 47511篇 |
| 临床医学 | 142687篇 |
| 内科学 | 303237篇 |
| 皮肤病学 | 34958篇 |
| 神经病学 | 125590篇 |
| 特种医学 | 62935篇 |
| 外国民族医学 | 242篇 |
| 外科学 | 246247篇 |
| 综合类 | 38188篇 |
| 现状与发展 | 3篇 |
| 一般理论 | 444篇 |
| 预防医学 | 120013篇 |
| 眼科学 | 38064篇 |
| 药学 | 121593篇 |
| 3篇 | |
| 中国医学 | 3968篇 |
| 肿瘤学 | 88437篇 |
出版年
| 2018年 | 16925篇 |
| 2017年 | 13423篇 |
| 2016年 | 15463篇 |
| 2015年 | 16829篇 |
| 2014年 | 22848篇 |
| 2013年 | 35381篇 |
| 2012年 | 46961篇 |
| 2011年 | 49948篇 |
| 2010年 | 29217篇 |
| 2009年 | 26348篇 |
| 2008年 | 47399篇 |
| 2007年 | 51310篇 |
| 2006年 | 51123篇 |
| 2005年 | 49434篇 |
| 2004年 | 48177篇 |
| 2003年 | 46480篇 |
| 2002年 | 45034篇 |
| 2001年 | 71516篇 |
| 2000年 | 73918篇 |
| 1999年 | 60531篇 |
| 1998年 | 17452篇 |
| 1997年 | 15429篇 |
| 1996年 | 15348篇 |
| 1995年 | 14468篇 |
| 1994年 | 13675篇 |
| 1992年 | 47678篇 |
| 1991年 | 46928篇 |
| 1990年 | 46006篇 |
| 1989年 | 44951篇 |
| 1988年 | 41549篇 |
| 1987年 | 40613篇 |
| 1986年 | 38579篇 |
| 1985年 | 37179篇 |
| 1984年 | 28308篇 |
| 1983年 | 24106篇 |
| 1982年 | 14611篇 |
| 1981年 | 13284篇 |
| 1979年 | 27380篇 |
| 1978年 | 19732篇 |
| 1977年 | 16757篇 |
| 1976年 | 15664篇 |
| 1975年 | 17072篇 |
| 1974年 | 20652篇 |
| 1973年 | 19715篇 |
| 1972年 | 18644篇 |
| 1971年 | 17367篇 |
| 1970年 | 16610篇 |
| 1969年 | 15814篇 |
| 1968年 | 14401篇 |
| 1967年 | 13161篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
2.
3.
4.
Stelter K. Theodoraki M. N. Becker S. Tsekmistrenko V. Olzowy B. Ledderose G. 《European archives of oto-rhino-laryngology》2015,272(3):639-639
European Archives of Oto-Rhino-Laryngology - 相似文献
5.
6.
7.
Objectives: The steeling effect suggests that early-life adversity can have a beneficial impact later in life. However, little is known about its underlying mechanisms and long-term outcomes . The study aimed to examine the role of early-life adversity (ELA) on successful aging, and whether this relationship can be explained by mental and physical health.
Method: Socio-demographics, early-life adversity (ELA), individual quality of life (iQoL), and mental and physical health of 270 individuals (Mage = 66.82 years, 71.5% female) were assessed. Polynomial regressions and mediation analyses were conducted.
Results: Significant inverse U-shaped associations were found between ELA and iQoL (β = ?.59, p = .005) and between ELA and mental health (β = ?.64, p = .002), but not between ELA and physical health. Furthermore, mental health significantly mediated the relationship between ELA and iQoL (b = ?.84, BCa CI [?1.66, ?.27]).
Conclusion: Highest level of individual quality of life (i.e. successful aging) was related to a moderate amount of ELA. Additionally, mental health significantly mediated this relationship. These findings suggest that some amount of ELA could be beneficial for successful aging. Resource-focused interventions are needed to improve health and promote successful aging for an underdetected, at-risk subgroup with low early-life adversity. 相似文献
8.
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9.
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
Aims
To examine the influence of pre-existing psychiatric disorder on the choice of treatment in patients with gynaecological cancer.Materials and methods
The analyses were based on all patients who underwent surgical treatment for endometrial, ovarian or cervical cancer who were registered in the Danish Gynecological Cancer Database in the years 2007–2014 (3059 patients with ovarian cancer, 5100 patients with endometrial cancer and 1150 with cervical cancer). Logistic regression model and Cox regression model, adjusted for relevant confounders, were used to estimate the effect of pre-existing psychiatric disorder on the course of cancer treatment. Our outcomes were (i) presurgical oncological treatment, (ii) macroradical surgery for patients with ovarian cancer, (iii) radiation/chemotherapy within 30 days and 100 days after surgery and (iv) time from surgery to first oncological treatment.Results
In the group of patients with ovarian cancer, more patients with a psychiatric disorder received macroradical surgery versus patients without a psychiatric disorder, corresponding to an adjusted odds ratio of 1.24 (95% confidence interval 0.62–2.41) and the chance for having oncological treatment within 100 days was odds ratio = 1.26 (95% confidence interval 0.77–2.10). As for patients with endometrial cancer, all outcome estimates were close to unity. The adjusted odds ratio for oncological treatment within 30 days after surgery in patients with cervical cancer with a history of psychiatric disorder was 0.20 (95% confidence interval 0.03–1.54).Conclusions
We did not find any significant differences in the treatment of ovarian and endometrial cancer in patients with pre-existing psychiatric diagnoses. When it comes to oncological treatment, we suggest that increased attention should be paid to patients with cervical cancer having a pre-existing psychiatric diagnosis. 相似文献10.
Katherine M. Duszynski Nicole L. Pratt John W. Lynch Jesia G. Berry Michael S. Gold 《Vaccine》2019,37(2):280-288