全文获取类型
收费全文 | 914580篇 |
免费 | 63491篇 |
国内免费 | 2387篇 |
专业分类
耳鼻咽喉 | 12746篇 |
儿科学 | 29093篇 |
妇产科学 | 26512篇 |
基础医学 | 128834篇 |
口腔科学 | 25080篇 |
临床医学 | 76283篇 |
内科学 | 186053篇 |
皮肤病学 | 19247篇 |
神经病学 | 72717篇 |
特种医学 | 37038篇 |
外国民族医学 | 337篇 |
外科学 | 144151篇 |
综合类 | 19226篇 |
一般理论 | 297篇 |
预防医学 | 65837篇 |
眼科学 | 20468篇 |
药学 | 64825篇 |
中国医学 | 1817篇 |
肿瘤学 | 49897篇 |
出版年
2018年 | 9329篇 |
2017年 | 7375篇 |
2016年 | 7920篇 |
2015年 | 9003篇 |
2014年 | 12737篇 |
2013年 | 19903篇 |
2012年 | 26468篇 |
2011年 | 28231篇 |
2010年 | 17093篇 |
2009年 | 16230篇 |
2008年 | 26961篇 |
2007年 | 28596篇 |
2006年 | 28713篇 |
2005年 | 28233篇 |
2004年 | 27141篇 |
2003年 | 26222篇 |
2002年 | 25859篇 |
2001年 | 41508篇 |
2000年 | 42665篇 |
1999年 | 36420篇 |
1998年 | 10176篇 |
1997年 | 9328篇 |
1996年 | 9240篇 |
1995年 | 8594篇 |
1994年 | 8215篇 |
1993年 | 7707篇 |
1992年 | 28300篇 |
1991年 | 27069篇 |
1990年 | 26491篇 |
1989年 | 25432篇 |
1988年 | 23632篇 |
1987年 | 23258篇 |
1986年 | 22328篇 |
1985年 | 21244篇 |
1984年 | 15919篇 |
1983年 | 13562篇 |
1982年 | 8236篇 |
1981年 | 7167篇 |
1979年 | 14667篇 |
1978年 | 10287篇 |
1977年 | 8703篇 |
1976年 | 8220篇 |
1975年 | 9011篇 |
1974年 | 10770篇 |
1973年 | 10240篇 |
1972年 | 9711篇 |
1971年 | 8952篇 |
1970年 | 8611篇 |
1969年 | 8063篇 |
1968年 | 7708篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
1.
2.
3.
F. Fruzzetti G. Palla A. Sbrana T. Simoncini M. R. Sessa 《Gynecological endocrinology》2020,36(10):938-940
AbstractObjective: To understand the origin of extremely high gonadotropin levels in a perimenopausal woman.Methods: A 52-year-old woman with a 2?months of amenorrhea followed spontaneous menstrual cycles recovery was referred to our outpatient clinic with elevated follicle-stimulating hormone (FSH, 483 mUI/ml), luteinizing hormone (LH, 475 mUI/ml) and prolactin (PRL, 173?ng/ml). She was known to take levosulpiride. The gonadotropin levels did not fit with the clinical features.Results: A gonadotroph tumor was ruled out. Further analysis confirmed constantly high FSH, LH and PRL levels. The measurements were repeated using different analytical platforms with different results. After serial dilutions, nonlinearity was present suggesting an immunoassay interference. After post-polyethylene glycol recovery, hormone levels appeared in the normal range. Anti-goat antibodies were recognized in the serum of the patient.Conclusions: This case report shows a case of falsely abnormal high gonadotropin and PRL levels in a woman during menopause transition. In the clinical practice the evaluation of gonadotropin profile is not recommended at this age, but the abnormal levels stimulated further evaluation. An interference in the assay due to anti-goat antibodies resulted in abnormally high level of FSH and LH. A strict collaboration between clinicians and the laboratory is needed, when laboratory findings do not correspond to clinical findings. 相似文献
4.
5.
6.
7.
F. Murina R. Felice S. Di Francesco L. Nelvastellio I. Cetin 《Gynecological endocrinology》2020,36(5):431-435
AbstractThis study is a single-center, retrospective analysis of postmenopausal women presenting with dyspareunia and vulvar pain, aiming to evaluate relative effectiveness of vestibular CO2 laser therapy as a treatment. Three monthly sessions of laser were performed to each patient and thereafter a three-months follow-up was stablished. A total number of 72 patients undergoing vestibular laser treatment were recruited from patient files in the period between 2016 and 2018. Among these, 39 women also received a concomitant treatment with ospemifene (60?mg/day) during the study period. There was a statistically significant reduction of all the symptoms in both groups up to the three month follow-up. Regarding dryness and dyspareunia, the relief tent to be more prominent in the ospemifene?+?laser group at all follow-ups and remained statistically significant at three-month follow-up. Specifically, vestibular dryness was significantly lower in the ospemifene?+?laser group compared with the laser treatment group (?87% vs???34%, respectively), and the vestibular health score started declining faster in the ospemifene?+?laser group. Although, additional research is needed to understand the mechanism of action, our data shows that a combination regimen of laser and ospemifene may improve clinical effectiveness for long-term treatment of symptoms associated with the under-recognized genitourinary syndrome of menopause. 相似文献
8.
Hanna Lee Mary K. Tan Andrew T. Yan Paul Angaran Paul Dorian Claudia Bucci Jean C. Gregoire Alan D. Bell Martin S. Green Peter L. Gross Allan Skanes Charles R. Kerr L. Brent Mitchell Jafna L. Cox Vidal Essebag Brett Heilbron Krishnan Ramanathan Carl Fournier Shaun G. Goodman 《The Canadian journal of cardiology》2019,35(2):160-168
Background
Physicians treating nonvalvular atrial fibrillation (AF) assess stroke and bleeding risks when deciding on anticoagulation. The agreement between empirical and physician-estimated risks is unclear. Furthermore, the association between patient and physician sex and anticoagulation decision-making is uncertain.Methods
We pooled data from 2 national primary care physician chart audit databases of patients with AF (Facilitating Review and Education to Optimize Stroke Prevention in Atrial Fibrillation and Coordinated National Network to Engage Physicians in the Care and Treatment of Patients with Atrial Fibrillation Chart Audit) with a combined 1035 physicians (133 female, 902 male) and 10,927 patients (4567 female and 6360 male).Results
Male physicians underestimated stroke risk in female patients and overestimated risk in male patients. Female physicians estimated stroke risk well in female patients but underestimated the risk in male patients. Risk of bleeding was underestimated in all. Despite differences in risk assessment by physician and patient sex, > 90% of patients received anticoagulation across all subgroups. There was modest agreement between physician estimated and calculated (ie, CHADS2 score) stroke risk: Kappa scores were 0.41 (0.35-0.47) for female physicians and 0.34 (0.32-0.36) for male physicians.Conclusions
Our study is the first to examine the association between patient and physician sex influences and stroke and bleeding risk estimation in AF. Although there were differences in agreement between physician estimated stroke risk and calculated CHADS2 scores, these differences were small and unlikely to affect clinical practice; further, despite any perceived differences in the accuracy of risk assessment by sex, most patients received anticoagulation. 相似文献9.
10.
According to the current nutritional recommendations issued by professional diabetes and nutrition associations, diabetic patients should keep to a diet consisting of 45–60% carbohydrates, 10–20% protein, and not more than 35% fat. However, not all of these nutritional recommendations are evidence based. For example, current studies show that the intake of insoluble roughage may be underrepresented. It is also possible that diabetic patients could benefit from keeping to the lower end of the recommended range for carbohydrates (45%) and the upper end of the range advised for protein (20%). 相似文献