全文获取类型
收费全文 | 55343篇 |
免费 | 4944篇 |
国内免费 | 3200篇 |
专业分类
耳鼻咽喉 | 855篇 |
儿科学 | 681篇 |
妇产科学 | 616篇 |
基础医学 | 7452篇 |
口腔科学 | 1061篇 |
临床医学 | 6638篇 |
内科学 | 9236篇 |
皮肤病学 | 812篇 |
神经病学 | 3302篇 |
特种医学 | 2726篇 |
外国民族医学 | 21篇 |
外科学 | 6035篇 |
综合类 | 6269篇 |
现状与发展 | 13篇 |
一般理论 | 5篇 |
预防医学 | 3209篇 |
眼科学 | 1302篇 |
药学 | 5632篇 |
38篇 | |
中国医学 | 2443篇 |
肿瘤学 | 5141篇 |
出版年
2024年 | 173篇 |
2023年 | 873篇 |
2022年 | 2152篇 |
2021年 | 3029篇 |
2020年 | 2188篇 |
2019年 | 2017篇 |
2018年 | 2050篇 |
2017年 | 1836篇 |
2016年 | 1834篇 |
2015年 | 2661篇 |
2014年 | 3079篇 |
2013年 | 2990篇 |
2012年 | 4286篇 |
2011年 | 4541篇 |
2010年 | 2806篇 |
2009年 | 2232篇 |
2008年 | 2968篇 |
2007年 | 2932篇 |
2006年 | 2709篇 |
2005年 | 2561篇 |
2004年 | 1877篇 |
2003年 | 1717篇 |
2002年 | 1430篇 |
2001年 | 1141篇 |
2000年 | 1127篇 |
1999年 | 1149篇 |
1998年 | 629篇 |
1997年 | 607篇 |
1996年 | 476篇 |
1995年 | 427篇 |
1994年 | 383篇 |
1993年 | 226篇 |
1992年 | 375篇 |
1991年 | 285篇 |
1990年 | 278篇 |
1989年 | 248篇 |
1988年 | 221篇 |
1987年 | 193篇 |
1986年 | 161篇 |
1985年 | 121篇 |
1984年 | 81篇 |
1983年 | 67篇 |
1982年 | 26篇 |
1981年 | 35篇 |
1980年 | 22篇 |
1979年 | 37篇 |
1978年 | 21篇 |
1977年 | 22篇 |
1976年 | 32篇 |
1974年 | 25篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Wong Jasin Ezeife Nnaemezie Kudla Angelika Crown Deborah Trierweiler Robert Capraro Pamela Tomazin Stephanie Su Han Pham Tri Heinemann Allen W. 《Journal of occupational rehabilitation》2022,32(3):464-472
Journal of Occupational Rehabilitation - Purpose The COVID-19 pandemic has disproportionately affected the lives of people with disabilities (PWD). How the pandemic affects the employment of PWD... 相似文献
82.
Kai Dong Mengjun Shen Guanqun Ju Sha Han Zhijun Wang Kaining Lu Dongliang Xu 《European urology》2021,79(2):283-289
BackgroundPartial nephrectomy or angioembolisation is commonly used for sporadic renal angiomyolipomas (RAMLs) with high RENAL scores, but there is a risk of reduced renal function, postoperative complications, and recurrence.ObjectiveTo describe a new technique for off-clamp laparoscopic evacuation of sporadic RAMLs with high RENAL scores that promotes maximal renal function maintenance and low postoperative complication and lesion recurrence rates.Design, setting, and participantsA retrospective cohort of patients undergoing off-clamp laparoscopic evacuation for sporadic RAMLs with RENAL scores ≥9 from January 2013 to June 2018 was included.Surgical procedureWe highlighted the curettage, suction, packing, and binding (CSPB) technique, a new off-clamp retroperitoneoscopic evacuation technique for sporadic RAMLs.MeasurementsDemographics, preoperative, intraoperative, and postoperative outcomes were assessed.Results and limitationsA total of 141 cases were included. The median (interquartile range [IQR]) tumour size was 7 (6.2–8.2) cm. The median (IQR) RENAL score was 10 (9–11). The median (IQR) operative time was 80 (65–125) min, with a median (IQR) estimated blood loss of 130 (90–362.5) ml. Conversion to neither open surgery nor standard laparoscopy occurred. The warm ischaemia time was zero for all cases. Postoperatively, 13 minor complications (Clavien grade 1) were recorded. No blood transfusions were reported. The glomerular filtration rate did not change significantly from preoperative period to 12-mo follow-up. Recurrence did not occur at the median follow-up period of 48 (36–60) mo. The retrospective design and lack of a control group are limitations of this study.ConclusionsOff-clamp retroperitoneoscopic tumour evacuation using the CSPB technique is feasible, safe, and effective for treating complex sporadic RAMLs.Patient summaryWe report a curettage, suction, packing, and binding technique for off-clamp retroperitoneoscopic evacuation of sporadic renal angiomyolipomas that leads to complete lesion clearance, excellent renal function preservation, and minimal perioperative complications. 相似文献
83.
84.
85.
86.
Hye-Sung Jo Jae Hyun Han Yoon Young Choi Jin-I Seok Young-In Yoon Dong-Sik Kim 《肝胆外科与营养》2021,10(3):325
BackgroundExcessive portal pressure after massive hepatectomy can cause hepatic sinusoidal injury and have deleterious impacts on hepatic functional recovery, contributing to developing post-hepatectomy liver failure. This study aimed to assess the effects of splanchnic vasoactive agents on hepatic functional recovery and regeneration while clarifying the underlying mechanism, using a 70% hepatectomy porcine model.MethodsEighteen pigs undergoing 70% hepatectomy were involved in this study and divided into three groups: control (n=6), terlipressin (n=6), and octreotide (n=6). Terlipressin (0.5 mg) and octreotide (0.2 mg) were administered 3 times a day for each group with the first dose starting just before surgery until the 7th postoperative day, at which time the surviving pigs were sacrificed. During the period, portal pressure, liver weight, biochemical analysis, histological injury score, and molecular markers were evaluated and compared between groups.ResultsThe 7-day survival rates in the octreotide, terlipressin, and control groups were 100%, 83.3%, and 66.7%, respectively. The portal pressures decreased in both terlipressin and octreotide groups than the control group at 30 minutes, 1 hour and 6 hours after hepatectomy. The amount of regeneration measured by liver weight to body weight ratio at the time of sacrifice in the terlipressin group was smaller than that in the control group (117% vs. 129%, P=0.03). Serum aspartate aminotransferase (AST) and total bilirubin levels at 1 and 6 hours after hepatectomy and prothrombin time/international normalized ratio (PT/INR) at 6 hours after hepatectomy were significantly improved in the terlipressin and octreotide groups compared to the control group. Serum endothelin-1 (ET-1) was significantly lower in the terlipressin group than that in the control group 6 hours after hepatectomy (P<0.01). The histological injury score in the control group was significantly higher than that in the terlipressin group on the 7th postoperative day (P<0.01).ConclusionsSplanchnic vasoactive agents, such as terlipressin and octreotide, could effectively decrease portal pressure and attenuate liver injury after massive hepatectomy. 相似文献
87.
Jue Chen MD PhD Lei Guo MM Lian Gu MPsy Hui Han MPsy 《The International journal of eating disorders》2021,54(1):102-106
In the past 40 years, the prevalence of eating disorders (ED) in China has shown an increasing trend, leading to an urgent need to develop efficient treatment modes and methods. Since the beginning of the new century, the diagnosis, treatment, and research of ED in China have been under development. This article gives an introduction and commentary on the treatment modes, treatment methods and their applications in ED in China. There are two main treatment forms for ED until now, that is, inpatient treatment and outpatient treatment. Inpatient treatment is recommended as the first choice. Since 2008, clinical psychotherapies such as cognitive behavioral therapy (CBT), dialectical behavioral therapy (DBT), and family-based treatment (FBT), which are effective for pathological symptoms of ED, have been introduced into China and developed clinically. Group CBT and group DBT for patients with ED and group FBT for caregivers might be the most efficient psychotherapy in China nowadays. A multi-family FBT support group could be developed as the basic treatment of ED patients. Although these new types of psychotherapy have observed effectiveness in clinical application, the Randomized Controlled Trials (RCT) are rare and need to be developed. 相似文献
88.
Surface modification of titanium implant by microarc oxidation and hydrothermal treatment 总被引:4,自引:0,他引:4
Huang P Zhang Y Xu K Han Y 《Journal of biomedical materials research. Part B, Applied biomaterials》2004,70(2):187-190
Surface modification of titanium implant is processed by microarc oxidation and hydrothermal treatment. A porous surface with a biologically active bone-like apatite layer was formed. The apatite layer consists of very fine crystals and high crystallinity and is integrated with the titanium alloy substrate with a graded structure without a distinct interface. Such a bioactive layer is expected not only to enhance the bony ingrowth into the porous structure, but also to improve the interlocking between implant and bone. 相似文献
89.
7例尿毒症贫血患者在自发急性缺氧状态下,其血清红细胞生成素(EPO)浓度显著提高(平均7倍),且与PO2呈负相关。缺氧状态纠正后血清EPO浓度下降。提示尿毒症贫血患者的EPO氧依赖调控系统功能尚存在,但处于不敏感的低调状态。进一步了解其机遇,则可能通过促进内源性EPO的生成,有助于悄毒症贫血的治疗。 相似文献
90.
To solve the problems existing in passive biochip systems, we designed a novel active biochip system. This system introduces negative pressure and controlling devices to adjust the antigen-antibody reaction on the nitrocellulose membrane. Computational simulation demonstrated that this system is a rapid, stable, robust and practical system that may enhance the efficiency of antigen-antibody reactions and improve the repeatability and accuracy of biochip analysis. 相似文献