全文获取类型
收费全文 | 45185篇 |
免费 | 2412篇 |
国内免费 | 162篇 |
专业分类
耳鼻咽喉 | 668篇 |
儿科学 | 2801篇 |
妇产科学 | 821篇 |
基础医学 | 5238篇 |
口腔科学 | 1292篇 |
临床医学 | 3219篇 |
内科学 | 8289篇 |
皮肤病学 | 1194篇 |
神经病学 | 2675篇 |
特种医学 | 1388篇 |
外科学 | 7202篇 |
综合类 | 1338篇 |
现状与发展 | 1篇 |
一般理论 | 22篇 |
预防医学 | 2185篇 |
眼科学 | 1551篇 |
药学 | 4336篇 |
2篇 | |
中国医学 | 359篇 |
肿瘤学 | 3178篇 |
出版年
2023年 | 348篇 |
2022年 | 1012篇 |
2021年 | 1752篇 |
2020年 | 940篇 |
2019年 | 1075篇 |
2018年 | 1505篇 |
2017年 | 1110篇 |
2016年 | 1437篇 |
2015年 | 1492篇 |
2014年 | 2187篇 |
2013年 | 2498篇 |
2012年 | 3556篇 |
2011年 | 3534篇 |
2010年 | 2094篇 |
2009年 | 1697篇 |
2008年 | 2407篇 |
2007年 | 2461篇 |
2006年 | 2246篇 |
2005年 | 2042篇 |
2004年 | 1891篇 |
2003年 | 1625篇 |
2002年 | 1413篇 |
2001年 | 826篇 |
2000年 | 747篇 |
1999年 | 623篇 |
1998年 | 305篇 |
1997年 | 250篇 |
1996年 | 244篇 |
1995年 | 208篇 |
1994年 | 184篇 |
1993年 | 155篇 |
1992年 | 369篇 |
1991年 | 363篇 |
1990年 | 376篇 |
1989年 | 345篇 |
1988年 | 293篇 |
1987年 | 246篇 |
1986年 | 237篇 |
1985年 | 234篇 |
1984年 | 181篇 |
1983年 | 129篇 |
1982年 | 77篇 |
1981年 | 84篇 |
1980年 | 73篇 |
1979年 | 115篇 |
1978年 | 72篇 |
1977年 | 91篇 |
1976年 | 68篇 |
1973年 | 62篇 |
1971年 | 61篇 |
排序方式: 共有10000条查询结果,搜索用时 375 毫秒
51.
52.
53.
Kamalesh Das Gouranga Prosad Mondal Ashok Kumar Dutta Bijoy Mukherjee Bansi Badan Mukherjee 《Journal of clinical neuroscience》2007,14(1):12-16
Awareness among the general population of the risk factors and warning symptoms of stroke is essential for preventative purposes and for immediate effective treatment. The aim of the present study was to assess the awareness, among the general population and stroke survivors, of the risk factors and warning symptoms of stroke, to develop an educational strategy for its prevention and immediate effective treatment. Six hundred and sixty stroke patients (370 male, 290 female) and 4000 people from the general population who accompanied the patients (2800 male, 1200 female) were interviewed, using three sets of questionnaires, on the risk factors and warning symptoms of stroke. Poor knowledge or awareness of the risk factors and warning symptoms of stroke was found in both groups. Both groups suggested educational programs for stroke using printed information, audiovisual programs and community survey programs using simple and understandable information for the prevention and immediate effective treatment of stroke. Poor awareness of stroke contributes to a delay in the arrival of patients in hospital emergency departments for immediate effective treatment. Multifaceted programs regarding stroke, including printed information, audiovisual programs and stroke service programs, are advocated by both patients and the general population to improve stoke treatment and prevention. 相似文献
54.
Akshay Pratap Devendra Kumar Gupta Chandra Shekhar Agrawal Rakesh Kumar Pandit Shailesh Adhikary Anand Kumar Awadhesh Tiwari Satyendra Narayan Singh 《International journal of urology》2007,14(3):198-202
OBJECTIVES: We analyzed the methods and outcomes of urethroplasty in men with complex urethral disruptions. METHODS: The medical records of 40 men with complex urethral disruptions were analyzed. Surgical methods were individualized according to stricture location, severity and length of the stricture, bladder neck characteristics and presence of complicating factors. Patients were divided into four groups based on the above characteristics. RESULTS: End-to-end urethroplasty performed in six patients with short bulbar strictures (<3 cm) was successful in all. Elaborated perineal repair was performed in 10 patients with intermediate (3-6 cm) strictures with or without complicating factors. Elaborated perineal repair with urethral substitution was performed in nine patients with long segment stricture (>6 cm). Abdominal transpubic repair was successfully applied to patients with rectourethral fistula or lacerated bladder neck. Success rate of anastomotic urethroplasty was 95% while over all success rate was 85%. CONCLUSION: Guidelines for urethral reconstruction of complex urethral disruptions are predicated on stricture length, location, bladder neck characteristics and associated complicating factors. End-to-end urethroplasty with stricture excision is highly reliable for short strictures for which previous operative repair have failed. Elaborated perineal repair is extremely versatile for intermediate and longer strictures with associated complicating factors. Abdominal transpubic urethroplasty is effective for patients with rectourethral fistula or lacerated bladder neck. 相似文献
55.
Pawan Kumar Dhruva Rao Deborah Clements Michael M. Davies Jared Torkington 《Surgical endoscopy》2007,21(6):1036
We present our comments on the above article. 相似文献
56.
The present study reveals our experience in the medical management of 30 cases of progressive/malignant exophthalmos, employing costicosteroid, b-blocker, diuretic and a preparation containing proteolytic enzymes. There was encouraging improvement in terms of symptoms, proptosis and optic nerve compression, while reduction of ophthalmoplegia was not so satisfactory. However, none of the patients needed decompression surgery. 相似文献
57.
A 50 year old man with a two month history of upper abdominal pain and a one month history of anorexia and weight loss, presented
with icterus and evidence of peritonitis. Laparotomy revealed biliary peritonitis which had been caused by a rupture of the
fundus of the gallbladder. The common bile duct was dilated and there was a large growth in the head of the pancreas with
multiple hepatic metastases. A cholecysto-jejunostomy and gastrojejunostomy were done and the patient had an uneventful recovery. 相似文献
58.
59.
Restriction maps of the rDNA cistron of twelve species of mosquitoes in six genera of the subfamily Culicinae were constructed using eight 6 bp recognition restriction enzymes. Anopheles albimanus was used as an outgroup. The size of the rDNA cistron ranged from 8.5 kb in Aedes katherinensis to 12.9 kb in Ae. polynesiensis. A total of twenty-six sites were scored; eighteen were polymorphic among ingroup taxa. The proportion of polymorphic nucleotide sites (Pnuc) was 0.059 and the heterozygosity per nucleotide site (Hnuc) was 0.028. Wagner and Fitch Parsimony, Dollo Parsimony and Nei-Li distance/neighbour-joining methods were used to construct phylogenetic trees. The rDNA RFLP dataset did not provide a well-supported phylogeny among culicine taxa. The RFLP phylogenies are incongruent with the morphology character based and molecular phylogenies and derived relationships did not correspond with current taxonomic classifications. The lack of resolution was due to homoplasy arising from frequent independent loss or gain of restriction sites among unrelated taxa. 相似文献
60.
A retrospective longitudinal study of 105 penetrating keratoplasties for vascularized corneal opacities was done. The results of cases with an etiology of healed trachoma or healed corneal ulcers were compared. The vascularization was graded from Grade I to V depending on the quadrant and type of vascularization. Graft clarity of 2+ or more in cases of trachomatous opacity was achieved in 93% of cases and that after postinfectious opacity in 71.8%. Prognosis was poor in cases where deep vascularization was present in more than two quadrants or more than 180 degrees. 相似文献