全文获取类型
收费全文 | 53630篇 |
免费 | 4281篇 |
国内免费 | 1253篇 |
专业分类
耳鼻咽喉 | 247篇 |
儿科学 | 888篇 |
妇产科学 | 1034篇 |
基础医学 | 3490篇 |
口腔科学 | 1568篇 |
临床医学 | 12619篇 |
内科学 | 5262篇 |
皮肤病学 | 341篇 |
神经病学 | 5034篇 |
特种医学 | 1263篇 |
外国民族医学 | 5篇 |
外科学 | 7124篇 |
综合类 | 5979篇 |
一般理论 | 7篇 |
预防医学 | 3103篇 |
眼科学 | 172篇 |
药学 | 6887篇 |
61篇 | |
中国医学 | 2720篇 |
肿瘤学 | 1360篇 |
出版年
2024年 | 107篇 |
2023年 | 1081篇 |
2022年 | 1398篇 |
2021年 | 2383篇 |
2020年 | 2438篇 |
2019年 | 2386篇 |
2018年 | 2280篇 |
2017年 | 2298篇 |
2016年 | 2083篇 |
2015年 | 1922篇 |
2014年 | 3781篇 |
2013年 | 5439篇 |
2012年 | 2863篇 |
2011年 | 3115篇 |
2010年 | 2530篇 |
2009年 | 2307篇 |
2008年 | 2514篇 |
2007年 | 2277篇 |
2006年 | 2103篇 |
2005年 | 1682篇 |
2004年 | 1486篇 |
2003年 | 1293篇 |
2002年 | 1099篇 |
2001年 | 950篇 |
2000年 | 774篇 |
1999年 | 720篇 |
1998年 | 611篇 |
1997年 | 578篇 |
1996年 | 458篇 |
1995年 | 416篇 |
1994年 | 434篇 |
1993年 | 320篇 |
1992年 | 321篇 |
1991年 | 278篇 |
1990年 | 220篇 |
1989年 | 223篇 |
1988年 | 201篇 |
1987年 | 189篇 |
1986年 | 218篇 |
1985年 | 240篇 |
1984年 | 249篇 |
1983年 | 159篇 |
1982年 | 169篇 |
1981年 | 131篇 |
1980年 | 104篇 |
1979年 | 60篇 |
1978年 | 57篇 |
1977年 | 40篇 |
1976年 | 44篇 |
1975年 | 30篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Jessica K. Perrotte Michael R. Baumann Raymond T. Garza Willie J. Hale 《Ethnicity & health》2020,25(1):47-64
ABSTRACTObjectives: The present study investigated the relationships of enculturation and depressive symptoms with health risk behavior engagement in Mexican-American college students and examined how these relationships differed by gender. Previous research has noted consistent gender differences in health risk behavior (e.g. alcohol use, substance use, and risky sexual behavior) among Latina/os, and emphasized the role of U.S. acculturation in this difference. Research examining the role of heritage cultural retention (i.e. enculturation), and including the added influence of mental health variables, such as depressive symptoms, is currently lacking. This study sought to address this gap.Design: A large sample (N?=?677) of Mexican-American college students from four universities (located in New York, California, Florida, and Texas) completed an online questionnaire assessing health risk behaviors and corresponding variables.Results: We found that males who endorsed more behavioral enculturation and depressive symptoms were more likely to engage in health risk behavior than all others in the sample. Contrary to previous literature, no relationship was found between behavioral enculturation and health risk behavior in females.Conclusion: The current study found behavioral enculturation to be associated with depressive symptoms, and in turn with health risk behaviors among the males in our sample. Additional research will be needed to identify the mechanism underlying the relationship between enculturation and depressive symptoms as well as between depressive symptoms and risky behavior. 相似文献
52.
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
53.
Michael A. Gibney David Fitz-Patrick David C. Klonoff Shahista Whooley Betty Lu Wen Yue 《Current medical research and opinion》2020,36(10):1591-1600
Abstract
Objective
Two similarly designed studies compared user experiences with a second-generation extra-thin-wall, 5-bevel 32?G?×?4?mm pen needle (PN) with redesigned hub versus four thinner commercially available PNs. 相似文献54.
《The Journal of arthroplasty》2022,37(7):1338-1347
BackgroundMultimodal pain therapy combining analgesics, local infiltration analgesia (LIA) and peripheral nerve blocks, such as fascia iliaca compartment block (FICB), can improve postoperative pain, nausea and vomiting (PONV) and ambulation in patients undergoing total hip arthroplasty (THA). We hypothesized that addition of FICB would decrease opioid requirements and length of stay (LOS) but could create a motor block.MethodsThis is a single center, prospective, blinded randomized controlled study of 152 patients undergoing elective THA via direct anterior approach from October 2019 till August 2021. Three patient groups were defined: patients receiving only spinal anesthesia (control group, n = 53); spinal anesthesia with LIA perioperatively (n = 50); and spinal anesthesia with FICB on the recovery unit (n = 49). Outcome measures consisted of postoperative pain scores, PONV, length of hospital stay, opioid requirements and mobility.ResultsOverall pain scores were low for all patient groups, with a lower pain score for LIA in comparison to the control group until 4 hours postoperatively (P < .05). Length of hospital stay, postoperative pain, nausea and vomiting (PONV) scores and quadriceps muscle strength did not differ significantly between groups. The control group showed higher scores at 12 hours postoperatively in comparison to FICB regarding rehabilitation potential, use of walking aids and activities of daily living (P < .05), but all groups reached the same endpoint 48 hours postoperatively. The LIA and FICB groups required less opioids until 24 hours postoperatively.ConclusionLIA is a beneficial adjuvant therapy to spinal anesthesia in THA patients as it may decrease pain scores and the need for opioid consumption. Adjuvant FICB only provided lower opioid requirements. 相似文献
55.
Rocco Spagnuolo Alessandro Corea Mariantonietta Blumetti Alessia Giovinazzo Massimiliano Serafino Caterina Pagliuso Raffaele Pagnotta Grazia Curto Cristina Cosco Vincenzo Cosco Rosellina Margherita Mancina Pietro Garieri Anna Papaleo Laura Grande Anna Barilaro Eugenio Garofalo Andrea Bruni Patrizia Doldo 《Journal of advanced nursing》2020,76(11):2993-3002
56.
慢性疼痛涉及临床各科的多种疾病,包括一些重大疾病和疑难疾病。中医体质学是中医学的新兴学科,其体质分类、体病相关思想以及“辨体论治”的诊疗方法已广泛应用到临床各科疾病的诊疗中。文章探讨了以中医体质学思想指导疼痛性疾病诊疗的若干理论问题,认为疼痛性疾病的发生与患者体质类型存在密切的关系。因此,在临床辨治疼痛性疾病时要考虑患者体质因素。所施方药不仅要符合病证特点,也要针对患者体质类型。并列举国医大师王琦教授辨体论治慢性前列腺炎盆腔疼痛综合征、偏头痛、过敏性头痛等疼痛性疾病的案例加以分析,以期为相关领域同仁提供参考。 相似文献
57.
58.
《The Journal for Nurse Practitioners》2020,16(1):69-73
Adolescent substance use is a national public health crisis. The most commonly used substances among adolescents are nicotine, alcohol, and marijuana. Use of these substances during adolescence has serious adverse effects on brain development, with impairments that can endure into adulthood. Advanced practice nurses in primary care can address substance use in the adolescent population with the use of evidence-based interventions, such as Screening, Brief Intervention, and Referral to Treatment (SBIRT). This article describes trends in adolescent substance use and use of the SBIRT intervention for low, medium, and high-risk use in this population. 相似文献
59.
《Journal of Clinical Orthopaedics and Trauma》2020,11(3):479-481
Posterior ankle impingement is a cause of posterior ankle pain common in those who perform frequent plantarflexion activities. Three young patients presented with posterior ankle pain which was initially attributed to peroneal tendon subluxation. However, detailed physical exam and imaging confirmed the diagnosis of posterior ankle impingement as the actual cause of pain. The peroneal tendon subluxation was not causal but an unrelated co-incidental finding. After failed prolonged conservative management (rest, immobilization and physical therapy), the patients underwent posterior ankle arthroscopic debridement for the impingement resulting in return to prior sporting activity without limitation and no recurrence of pain at 19 months follow-up. Posterior ankle impingement diagnosis could be masked by co-incidental asymptomatic peroneal tendon subluxation in pediatric patients. 相似文献
60.
《中国现代医生》2020,58(34):60-63
目的 通过检测老年轻度认知障碍(MCI)患者血清瘦素(LEP)、甲状腺激素水平,分析其与局部脑血流量(rCBF)的关系。方法 选择本院收治的128 例老年MCI 患者,另选健康者128 例作为对照组。检测血清LEP、甲状腺激素、大脑各区域rCBF 水平并分析其相关性。结果 老年MCI 组患者左右侧额叶、右侧颞叶、左侧顶叶、左右侧基底节区域脑血流量[(43.81±8.62)mL/(100 g·min)、(43.24±7.93)mL/(100 g·min)、(45.14±6.98)mL/(100 g·min)、(45.86±6.77)mL/(100 g·min)、(67.95±8.52)mL/(100 g·min)、(68.36±8.34)mL/(100 g·min)]低于对照组[(46.39±8.31)mL/(100 g·min)、(46.52±8.56)mL/(100 g·min)、(47.37±7.04)mL/(100 g·min)、(48.25±6.98)mL/(100 g·min)、(70.34±8.96)mL/(100 g·min)、(70.58±8.57)mL/(100 g·min)](P<0.05)。老年MCI 组患者血清LEP、T3、FT3 水平[(4.87±1.56)μg/L、(1.21±0.16)nmol/L、(3.04±0.36)pmol/L]低于对照组[(11.45±3.92)μg/L、(1.68±0.21)nmol/L、(4.82±1.21)pmol/L](P<0.05),TSH 水平为(2.78±0.75)IU/mL,高于对照组的(1.13±0.38)IU/mL(P<0.05)。老年MCI 患者血清LEP 水平与左侧额叶、右侧颞叶、左侧顶叶rCBF 呈正相关(r=0.452、0.537、0.544,P 均<0.05),T3 水平与左侧额叶、右侧颞叶rCBF 呈正相关(r=0.427、0.521,P 均<0.05),FT3 水平与右侧颞叶rCBF 呈正相关(r=0.492,P<0.05),TSH 水平与左侧额叶、右侧颞叶rCBF 呈负相关(r=-0.463、-0.489,P 均<0.05)。结论 老年MCI 患者血清中LEP、T3、FT3 水平降低,TSH 水平升高,且与不同区域rCBF 有相关性,可通过调控脑血管功能影响rCBF 变化水平。 相似文献