全文获取类型
收费全文 | 5654篇 |
免费 | 271篇 |
国内免费 | 33篇 |
专业分类
耳鼻咽喉 | 109篇 |
儿科学 | 267篇 |
妇产科学 | 129篇 |
基础医学 | 470篇 |
口腔科学 | 234篇 |
临床医学 | 504篇 |
内科学 | 1318篇 |
皮肤病学 | 103篇 |
神经病学 | 277篇 |
特种医学 | 109篇 |
外科学 | 916篇 |
综合类 | 349篇 |
一般理论 | 4篇 |
预防医学 | 359篇 |
眼科学 | 186篇 |
药学 | 387篇 |
中国医学 | 32篇 |
肿瘤学 | 205篇 |
出版年
2024年 | 4篇 |
2023年 | 86篇 |
2022年 | 279篇 |
2021年 | 396篇 |
2020年 | 184篇 |
2019年 | 200篇 |
2018年 | 227篇 |
2017年 | 151篇 |
2016年 | 185篇 |
2015年 | 244篇 |
2014年 | 281篇 |
2013年 | 286篇 |
2012年 | 427篇 |
2011年 | 398篇 |
2010年 | 231篇 |
2009年 | 195篇 |
2008年 | 303篇 |
2007年 | 289篇 |
2006年 | 297篇 |
2005年 | 276篇 |
2004年 | 227篇 |
2003年 | 213篇 |
2002年 | 169篇 |
2001年 | 46篇 |
2000年 | 49篇 |
1999年 | 35篇 |
1998年 | 28篇 |
1997年 | 18篇 |
1996年 | 19篇 |
1995年 | 13篇 |
1994年 | 15篇 |
1993年 | 7篇 |
1992年 | 22篇 |
1991年 | 18篇 |
1990年 | 19篇 |
1989年 | 13篇 |
1988年 | 14篇 |
1987年 | 13篇 |
1986年 | 5篇 |
1985年 | 10篇 |
1984年 | 5篇 |
1983年 | 6篇 |
1980年 | 5篇 |
1979年 | 5篇 |
1977年 | 5篇 |
1974年 | 6篇 |
1973年 | 4篇 |
1972年 | 4篇 |
1970年 | 5篇 |
1969年 | 4篇 |
排序方式: 共有5958条查询结果,搜索用时 15 毫秒
81.
82.
Bunyami Ozogul Abdullah Kisaoglu Sabri Selcuk Atamanalp Gurkan Ozturk Bulent Aydinli Mehmet İlhan Yıldırgan A. Mecit Kantarcı 《The Indian journal of surgery》2015,77(2):257-260
Hydatid cyst disease, which is endemically observed and an important health problem in our country, involves the spleen at a frequency ranking third following the liver and the lungs. In this study, we aimed to evaluate the efficacy and results of management in splenic hydatid cysts. The demographic data, localization, diagnosis, treatment methods, and the length of postoperative hospital stay of patients with splenic hydatid cysts in a 12-year period were evaluated retrospectively. Seventeen cases were evaluated. Among these, 13 were females and four were males. Seven had solitary splenic involvement, eight had involvement of both the spleen and the liver, and two had multiple organ involvement. Ten had undergone splenectomy, one had undergone distal splenectomy, and the remaining cases had undergone different surgical procedures. The patients had received albendazole treatment in the pre- and postoperative period. One patient had died secondary to hypernatremia on the first postoperative day. The clinical picture in splenic hydatid cysts, which is seen rarely, is usually asymptomatic. The diagnosis is established by ultrasonography and abdominal CT. Although splenectomy is the standard mode of treatment, spleen-preserving methods may be used. 相似文献
83.
Sener G Paskaloglu K Toklu H Kapucu C Ayanoglu-Dulger G Kacmaz A Sakarcan A 《Journal of pineal research》2004,36(4):232-241
Chronic renal failure (CRF) is associated with oxidative stress that promotes production of reactive oxygen species (ROS). Melatonin, the chief secretory product of the pineal gland, was recently found to be a potent free radical scavenger and antioxidant. The aim of this study was to examine the role of melatonin in protecting the aorta, heart, corpus cavernosum, lung, diaphragm, and kidney tissues against oxidative damage in a rat model of CRF, which was induced by five of six nephrectomy. Male Wistar albino rats were randomly assigned to either the CRF group or the sham-operated control group, which had received saline or melatonin (10 mg/kg, i.p.) for 4 wk. CRF was evaluated by serum blood urea nitrogen (BUN) level and creatinine measurements. Aorta and corporeal tissues were used for contractility studies, or stored along with heart, lung, diaphragm, and kidney tissues for the measurement of malondialdehyde (MDA, an index of lipid peroxidation), protein carbonylation (PC, an index for protein oxidation), and glutathione (GSH) levels (a key antioxidant). Plasma MDA, PC, and GSH levels and erythrocytic superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) activities were studied to evaluate the changes of antioxidant status in CRF. In the CRF group, the contraction and the relaxation of aorta and corpus cavernosum samples decreased significantly compared with controls (P < 0.05-0.001). Melatonin treatment of the CRF group restored these responses. In the CRF group, there were significant increases in tissue MDA and PC levels in all tissues with marked reductions in GSH levels compared with controls (P < 0.05-0.001). In the plasma, while MDA and PC levels increased, GSH, SOD, CAT, and GSH-Px activities were reduced. Melatonin treatment reversed these effects as well. In this study, the increase in MDA and PC levels and the concomitant decrease in GSH levels of tissues and plasma and also SOD, CAT, GSH-Px activities of plasma demonstrate the role of oxidative mechanisms in CRF-induced tissue damage, and melatonin, via its free radical scavenging and antioxidant properties, ameliorates oxidative organ injury. CRF-induced dysfunction of the aorta and corpus cavernosum of rats was reversed by melatonin treatment. Thus, supplementing CRF patients with adjuvant therapy of melatonin may have some benefit. 相似文献
84.
85.
86.
Abdullah M. Aldrees Nada E. Tashkandi Areej A. AlWanis Munerah S. AlSanouni Nasir H. Al-Hamlan 《Saudi Dental Journal》2015,27(1):30-39
Objective
This study aims to assess the orthodontic diagnostic skills, referral patterns, and the perceptions of orthodontic benefits of pediatric and general dentists in comparison with orthodontists.Materials and methods
Two online surveys were e-mailed to pediatric dentists, general dentistry practitioners, and orthodontists registered as members of the Saudi Dental Society and the Saudi Orthodontic Society. The surveys included questions about the type of orthodontic treatment provided, referral trends, and timing; presumed benefits associated with successful orthodontic treatment; and diagnosis and treatment plans of seven cases representing different malocclusions.Results
In total, 25 orthodontists, 18 pediatric dentists, and 14 general practitioners completed the survey. Only 38.8% of pediatric dentists and 7.1% of general practitioners reported that they practiced orthodontics clinically. The perceptions of the three groups toward the benefits of orthodontic treatment were comparable in the psychosocial areas. However, the orthodontists perceived significantly lesser effects of orthodontic treatment on the amelioration of temporomandibular disorder (TMD) symptoms. Pediatric dentists tended to rate the need and urgency of treatment higher, while general practitioners tended to rate the need of treatment lower. The selected treatment plans for three early malocclusion cases showed the greatest discrepancies between the orthodontists and the other two groups.Conclusions
The orthodontists consistently and significantly downplayed the perceived benefit of orthodontic treatment to reduce TMD symptoms. Also, while there was a similarity in the diagnosis, there were notable differences in the proposed treatment approaches, perceived treatment need, and timing of intervention between the three groups of practitioners. 相似文献87.
Enver Turan Yavuz Ye?ilova Hacer Altun Sürücü Nurittin Ardic Nebiye Doni Mustafa Aksoy Abdullah Yesilova Steve Oghumu Sanjay Varikuti Abhay R. Satoskar 《The American journal of tropical medicine and hygiene》2015,93(3):559-563
Cutaneous leishmaniasis (CL) is a significant public health problem with increasing incidence, especially in extreme circumstances. In this study, we compared the sociodemographic and clinical characteristics of 685 Syrian CL patients afflicted by the Syrian conflict and 685 Turkish CL patients in 2012. Patient age, gender, duration of disease, lesion size, type, and localization were evaluated. The duration of CL disease in Syrian CL patients (4.5 ± 4.3 weeks) was shorter than that of Turkish CL patients (11.9 ± 9.7 weeks). The number of lesions was greater in Syrian patients (2.46 ± 2.43) than in Turkish patients (1.93 ± 1.47). Lesion sizes were comparable between both groups (Syrian, 11.2 ± 8.7 mm; Turkish, 10.7 ± 7.7 mm). In Syrian CL patients, nodular type lesions were the most common (325 patients, 49.1%), whereas, in Turkish CL patients, ulcer type lesions were the most common (352 patients, 51.5%). Our results indicate variations in the clinicoepidemiological features of CL between Turkish and Syrian patients within Sanliurfa province. This highlights the impact of social unrest and environmental conditions on the epidemiology of CL within this region. Approaches to prevention, control, and treatment of CL in these areas should take into consideration the emerging changes in clinicoepidemiological parameters of the disease. 相似文献
88.
Management of interstitial cystitis/bladder pain syndrome (IC/BPS) remains a challenge due to poor understanding on its etiology. Complementary and alternative medicine (CAM), as an optional treatment, has been widely used, because no definitive conventional therapy is available. The different domain of CAM provides miscellaneous treatments for IC/BPS, which mainly include dietary modification, nutraceuticals, bladder training, biofeedback, yoga, massage, physical therapy, Qigong, traditional Chinese medicine and acupuncture. Clinical evidence has shown that each therapy can certainly benefit a portion of IC/BPS patients. However, the target patient group of each therapy has not been well studied and randomized, controlled trials are needed to further confirm the efficacy and reliability of CAM on managing IC/BPS. Despite these limitations, CAM therapeutic characteristics including non-invasive and effectiveness for specific patients allow clinicians and patients to realize multimodal and individualized therapy for IC/BPS. 相似文献
89.
90.
Ahmed S. BaHammam Suhail S. Alassiri Aisha H. Al-Adab Ibrahim M. Alsadhan Abdullah M. Altheyab Abdalla H. Alrayes Mohammad M. Alkhawajah Awad H. Olaish 《Saudi medical journal》2015,36(8):911-919