全文获取类型
收费全文 | 141229篇 |
免费 | 11513篇 |
国内免费 | 4209篇 |
专业分类
耳鼻咽喉 | 1315篇 |
儿科学 | 7939篇 |
妇产科学 | 4033篇 |
基础医学 | 15512篇 |
口腔科学 | 2181篇 |
临床医学 | 15433篇 |
内科学 | 27069篇 |
皮肤病学 | 2636篇 |
神经病学 | 11748篇 |
特种医学 | 3094篇 |
外国民族医学 | 4篇 |
外科学 | 13070篇 |
综合类 | 18855篇 |
现状与发展 | 18篇 |
预防医学 | 9356篇 |
眼科学 | 2697篇 |
药学 | 7096篇 |
68篇 | |
中国医学 | 12421篇 |
肿瘤学 | 2406篇 |
出版年
2024年 | 1844篇 |
2023年 | 3129篇 |
2022年 | 5429篇 |
2021年 | 7117篇 |
2020年 | 6581篇 |
2019年 | 5286篇 |
2018年 | 5146篇 |
2017年 | 5239篇 |
2016年 | 5432篇 |
2015年 | 5103篇 |
2014年 | 9567篇 |
2013年 | 10184篇 |
2012年 | 7705篇 |
2011年 | 8847篇 |
2010年 | 6875篇 |
2009年 | 6698篇 |
2008年 | 6649篇 |
2007年 | 6706篇 |
2006年 | 6042篇 |
2005年 | 4953篇 |
2004年 | 4228篇 |
2003年 | 3753篇 |
2002年 | 2685篇 |
2001年 | 2397篇 |
2000年 | 2048篇 |
1999年 | 1889篇 |
1998年 | 1581篇 |
1997年 | 1470篇 |
1996年 | 1414篇 |
1995年 | 1336篇 |
1994年 | 1158篇 |
1993年 | 1045篇 |
1992年 | 939篇 |
1991年 | 720篇 |
1990年 | 650篇 |
1989年 | 562篇 |
1988年 | 548篇 |
1987年 | 491篇 |
1986年 | 445篇 |
1985年 | 550篇 |
1984年 | 460篇 |
1983年 | 284篇 |
1982年 | 372篇 |
1981年 | 329篇 |
1980年 | 263篇 |
1979年 | 219篇 |
1978年 | 141篇 |
1977年 | 114篇 |
1976年 | 96篇 |
1975年 | 44篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
环境内分泌干扰物(EED)广泛存在于日常生活中,是一类可以干扰激素行为的外源性化学物。EED可以结合人体内不同的受体,通过多种机制增强或抑制体内正常的内分泌功能,从而引发多种疾病。多囊卵巢综合征(PCOS)病因复杂,已有研究结果表明PCOS的发生与环境因素有关。相关流行病学和基础实验研究表明,EED参与PCOS的发生、发展,但具体作用机制仍需进一步研究。现就EED与PCOS的关系及可能的相关作用机制进行阐述,总结EED与PCOS的关系,为干预PCOS患者的生活方式并阻断疾病发生提供新的线索。 相似文献
23.
ABSTRACTPurpose: To report two unique cases of spontaneous uveal effusion syndrome (UES) from the same family.Methods: The patients included father (54 years old) and a daughter (23 years old). The father presented 7 years ago with bilateral exudative retinal detachment, nanophthalmic eyes (axial length 16.11 mm and 16.43 mm in right and left eyes, respectively) with hypermetropia, and a thickened sclera on MRI. The daughter presented with left eye peripheral exudative annular retinal detachment with bilateral nanophthalmos (axial length 20.7 mm and 20.33 mm, in right and left eyes, respectively), with MRI showing ciliochoroidal detachment, suprachoroidal effusion and mild thickening of the sclera in left eye.Results: The father underwent subscleral sclerectomy in the left eye that led to resolution of submacular fluid. Scleral biopsy confirmed the deposition of glycosaminoglycans on Alcian blue stain. The daughter was kept under observation, because of absence of any macular subretinal fluid, and counselled about the familial nature of the disease and possible need for future intervention.Conclusion: This is the first report of familial nanophthalmos presenting with spontaneous UES. 相似文献
24.
25.
26.
27.
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
28.
《Diagnostic and interventional imaging》2021,102(9):493-500
Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been reported as a global emergency. As respiratory dysfunction is a major clinical presentation of COVID-19, chest computed tomography (CT) plays a central role in the diagnosis and management of patients with COVID-19. Recent advances in imaging approaches using artificial intelligence have been essential as a quantification and diagnostic tool to differentiate COVID-19 from other respiratory infectious diseases. Furthermore, cardiovascular involvement in patients with COVID-19 is not negligible and may result in rapid worsening of the disease and sudden death. Cardiac magnetic resonance imaging can accurately depict myocardial involvement in SARS-CoV-2 infection. This review summarizes the role of the radiology department in the management and the diagnosis of COVID-19, with a special emphasis on ultra-high-resolution CT findings, cardiovascular complications and the potential of artificial intelligence. 相似文献
29.
《Foot and Ankle Surgery》2022,28(8):1427-1432
BackgroundAnkle range of motion abnormalities have been often linked with alteration in knee kinematics leading to the development of patellofemoral pain syndrome (PFPS). Literature exploring the relationship between ankle dorsiflexion range of motion (DF ROM) and knee kinematics during functional tasks is scanty. This study aims to assess the relation between ankle DF ROM and frontal plane projection angle (FPPA), one of the knee kinematic variables, in individuals with and without PFPS during a step-down test.MethodsThis is a case-control study in which seventy PFPS patients and other 70 asymptomatic control subjects had their ankle DF ROM measured using an inclinometer with the knee flexed and extended. Their FPPA angles were measured using Kinovea software while doing the step-down test.ResultsWhen the two groups were compared, ankle DF ROM measured with the knee flexed was higher in the control group (33.15 ± 4.96) than in the PFPS group (30.20 ± 6.93) (p = 0.03). In both the PFPS group and the control group, the correlation between FPPA and ankle DF ROM with the knee flexed was statistically insignificant (p = 0.075 and 0.323 respectively).ConclusionDecreased ankle DF ROM can be one of the contributing factors to the development of PFPS in the context of greater dynamic knee valgus. 相似文献
30.