全文获取类型
收费全文 | 10180100篇 |
免费 | 640139篇 |
国内免费 | 161537篇 |
专业分类
耳鼻咽喉 | 132009篇 |
儿科学 | 284361篇 |
妇产科学 | 233948篇 |
基础医学 | 1263186篇 |
口腔科学 | 268163篇 |
临床医学 | 1032235篇 |
内科学 | 1708458篇 |
皮肤病学 | 205150篇 |
神经病学 | 734784篇 |
特种医学 | 379482篇 |
外国民族医学 | 1691篇 |
外科学 | 1340829篇 |
综合类 | 711330篇 |
现状与发展 | 513篇 |
一般理论 | 3803篇 |
预防医学 | 820879篇 |
眼科学 | 233012篇 |
药学 | 869312篇 |
2805篇 | |
中国医学 | 210061篇 |
肿瘤学 | 545765篇 |
出版年
2022年 | 131490篇 |
2021年 | 200704篇 |
2020年 | 143236篇 |
2019年 | 146270篇 |
2018年 | 178339篇 |
2017年 | 158612篇 |
2016年 | 152797篇 |
2015年 | 189649篇 |
2014年 | 277714篇 |
2013年 | 369887篇 |
2012年 | 522643篇 |
2011年 | 566857篇 |
2010年 | 384053篇 |
2009年 | 345619篇 |
2008年 | 482935篇 |
2007年 | 503290篇 |
2006年 | 480733篇 |
2005年 | 442599篇 |
2004年 | 389566篇 |
2003年 | 361200篇 |
2002年 | 333123篇 |
2001年 | 314677篇 |
2000年 | 313411篇 |
1999年 | 268502篇 |
1998年 | 111980篇 |
1997年 | 98362篇 |
1996年 | 92374篇 |
1995年 | 84559篇 |
1994年 | 76627篇 |
1993年 | 65611篇 |
1992年 | 184939篇 |
1991年 | 179187篇 |
1990年 | 173908篇 |
1989年 | 168791篇 |
1988年 | 156160篇 |
1987年 | 152226篇 |
1986年 | 144894篇 |
1985年 | 138253篇 |
1984年 | 105402篇 |
1983年 | 90505篇 |
1982年 | 57568篇 |
1979年 | 95061篇 |
1978年 | 68229篇 |
1977年 | 58917篇 |
1976年 | 54573篇 |
1975年 | 59703篇 |
1974年 | 69045篇 |
1973年 | 65977篇 |
1972年 | 61119篇 |
1971年 | 56761篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Anela Stanic Denis Rybin Francis Cannata Carole Hohl Jennifer Brody Jessie Gaeta 《AIDS care》2021,33(1):1-9
ABSTRACT The lack of stable housing can impair access and continuity of care for patients living with human immunodeficiency virus (HIV). This study investigated the relationship between housing status assessed at multiple time points and several core HIV-related outcomes within the same group of HIV patients experiencing homelessness. Patients with consistently stable housing (CSH) during the year were compared to patients who lacked CSH (non-CSH group). The study outcomes included HIV viral load (VL), CD4 counts, and health care utilization. Multivariable and propensity weighted analyses were used to assess outcomes adjusting for potential group differences. Of 208 patients, 88 (42%) had CSH and 120 (58%) were non-CSH. Patients with CSH had significantly higher proportion of VL suppression and higher mean CD4 counts. The frequency of nurse visits in the CSH group was less than a half of that in the non-CSH group. Patients with CSH were less likely to be admitted to the medical respite facility, and if admitted, their length of stay was about a half of that for the non-CSH group. Our study findings show that patients with CSH had significantly better HIV virologic control and immune status as well as improved health care utilization. 相似文献
2.
Emeline Colomba Patricia Pautier Fanny Pommeret Alexandra Leary 《Expert review of anticancer therapy》2019,19(6):437-446
Introduction: The landscape of poly (ADP-ribose) polymerase (PARP) inhibition in ovarian cancer is rapidly evolving and becoming increasingly complex. Ovarian cancer is leading therapeutic innovation by providing the proof of concept for DNA repair as a target. Three different PARP inhibitors have now received approvals in the US and Europe in different indications. Subtle but crucial differences can be found among the licensed indications for each PARP inhibitor in terms of histology, type of BRCA mutation (germline and/or somatic), number of prior lines of chemotherapy and whether the indication is in the treatment or maintenance settings.
Areas covered: We review the latest clinical data regarding the PARP inhibitor rucaparib in ovarian cancer, provide an update on the evolving landscape of PARP inhibition in ovarian cancer, and summarize avenues of ongoing and future research.
Expert opinion: All eligible patients should be offered a PARP inhibitor. SOLO1 trial results demonstrated an unprecedented benefit maintenance with PARP inhibitors in first line. Results from trials evaluating PARP inhibitors as maintenance in first line regardless of BRCA status and from trials evaluating combinatorial strategies are eagerly awaited. 相似文献
3.
Exhaled nitric oxide in children with allergic rhinitis: A potential biomarker of asthma development 下载免费PDF全文
4.
穴位埋线是长效针灸,是在传统针具和针法基础上建立和发展起来的,是针灸技术的发展和延伸,穴位埋线的核心技术是穿刺技术,穴位埋线的三大要素中,针具、埋藏物、穿刺技巧之间是互相影响、互相促进的。针具的改进成功实现了穴位埋线疗法的第一次飞跃,埋藏物的改进成功实现了穴位埋线疗法的第二次飞跃,穿刺技术的改进和创新是穴位埋线疗法的第三次飞跃。 相似文献
5.
6.
7.
8.
Moderate sedatives have been increasingly used to improve patient comfort during flexible bronchoscopy (FB). However, routine use of moderate sedation during FB is controversial because its efficacy and safety are not well established.This study aims to evaluate the efficacy and safety of moderate sedation during FB.A search was made of Medline, EMBASE, and the Cochrane Library to May 2014.Randomized controlled trials (RCTs) and quasi-RCTs were included.The main analysis was designed to examine the efficacy of moderate sedation during FB in sedation than no-sedation.The willingness to repeat FB was significantly more in sedation than no-sedation (odds ratio [OR] 2.30; 95% confidence interval [CI] 1.11–4.73; P = 0.02; I2 = 22.5). The duration of FB was shorter in sedation group than no-sedation group (standardized mean difference [SMD] −0.21; 95% CI −0.38 to −0.03; P = 0.02; I2 = 78.3%). Event of hypoxia was not significantly different between sedation and no-sedation groups (OR 0.86; 95% CI 0.42–1.73; P = 0.67; I2 = 0%). The SpO2 during procedure was not different between sedation and no-sedation groups (SMD −0.14; 95% CI −0.37 to 0.08; P = 0.21; I2 = 49.9%). However, in subgroup analysis without supplemental oxygen, the SpO2 was significantly lower in sedation than no-sedation group (SMD −0.45; 95% CI −0.78 to −0.11; P = 0.01; I2 = 0.0%).According to this meta-analysis, moderate sedation in FB would be useful in patients who will require repeated bronchoscopies as well as safe in respiratory depression. To our knowledge, although the various sedative drugs are already used in the real field, this analysis was the first attempt to quantify objective results. We anticipate more definite and studies designed to elucidate standardized outcomes for moderate sedation in FB. 相似文献
9.
Feng Wang Dachuan Wang Bingyi Tan Jun Dong Rongjie Feng Zenong Yuan Naiguo Wang 《Medicine》2015,94(39)
The present study aimed at examining the curative effect of modified posterior operation on treatment of Kümmell''s disease.About 30 patients of Kümmell''s disease with complete image and clinical data treated during June 2004 to July 2013 were conducted with anterior and posterior approaches, respectively. Kyphotic Cobb angle, fractured vertebra wedge angle, and the anterior and posterior heights of fractured vertebra were all measured through x-ray before and after operation, and the pain visual analog scale (VAS) was determined for evaluating the effect of operations. The injury and restoration of neurological function were assessed using Frankel classification.Patients in group A were treated with anterior operation, whereas group B was posterior operation. Postoperatively, VAS score, kyphotic Cobb angle, anterior vertebra height, and pathologic vertebra wedge angle were all significantly improved in patients with Kümmell''s disease receiving modified posterior operation (group B). Similar results were also observed in patients with anterior operation. The improvement of VAS and correction rate of kyphotic Cobb angle indicated equivalent effects of posterior and anterior operations. Meanwhile, alleviated neurological function damage was observed in 2 groups. Relevant factor analysis illustrated that there was no significant correlation of the severity and improvement rate of pain symptoms with age, medical history, anterior and posterior vertebra heights, kyphotic Cobb angle, and pathological vertebra wedge angle.Compared with traditional anterior approach, modified posterior operation, adopting transpedicular vertebral body grafting combined with vertebral pedicle screw fixation, could produce equivalent effects on kyphosis correction, pain relief, and improvement of neurological function in patients with Kümmell''s disease. 相似文献
10.