全文获取类型
收费全文 | 8463篇 |
免费 | 609篇 |
国内免费 | 103篇 |
专业分类
耳鼻咽喉 | 64篇 |
儿科学 | 215篇 |
妇产科学 | 395篇 |
基础医学 | 946篇 |
口腔科学 | 191篇 |
临床医学 | 1038篇 |
内科学 | 1704篇 |
皮肤病学 | 80篇 |
神经病学 | 713篇 |
特种医学 | 279篇 |
外科学 | 1102篇 |
综合类 | 235篇 |
一般理论 | 4篇 |
预防医学 | 475篇 |
眼科学 | 184篇 |
药学 | 726篇 |
中国医学 | 83篇 |
肿瘤学 | 741篇 |
出版年
2023年 | 45篇 |
2022年 | 105篇 |
2021年 | 180篇 |
2020年 | 106篇 |
2019年 | 179篇 |
2018年 | 216篇 |
2017年 | 180篇 |
2016年 | 178篇 |
2015年 | 246篇 |
2014年 | 291篇 |
2013年 | 380篇 |
2012年 | 547篇 |
2011年 | 623篇 |
2010年 | 418篇 |
2009年 | 353篇 |
2008年 | 506篇 |
2007年 | 509篇 |
2006年 | 520篇 |
2005年 | 454篇 |
2004年 | 401篇 |
2003年 | 332篇 |
2002年 | 294篇 |
2001年 | 273篇 |
2000年 | 226篇 |
1999年 | 195篇 |
1998年 | 86篇 |
1997年 | 74篇 |
1996年 | 71篇 |
1995年 | 53篇 |
1994年 | 40篇 |
1993年 | 43篇 |
1992年 | 112篇 |
1991年 | 121篇 |
1990年 | 99篇 |
1989年 | 74篇 |
1988年 | 73篇 |
1987年 | 74篇 |
1986年 | 47篇 |
1985年 | 41篇 |
1984年 | 34篇 |
1983年 | 35篇 |
1981年 | 25篇 |
1980年 | 18篇 |
1979年 | 27篇 |
1978年 | 33篇 |
1977年 | 18篇 |
1976年 | 19篇 |
1975年 | 18篇 |
1974年 | 26篇 |
1968年 | 19篇 |
排序方式: 共有9175条查询结果,搜索用时 15 毫秒
11.
The clinical and ultrasonographic (US) features of 15 cases of mesenteric or omental cyst are herein described. This series included seven male and eight female patients, whose age ranged from 2–89 years. Correct clinical diagnosis was made in two children only, but preoperative US examination accurately demonstrated the lesion in 11 of 13 patients (85%). These cystic lesions usually had a thin wall, internal septations, and fluid content with sedimentation. Enteric duplication cysts had a relatively thick wall merging with the muscle layer of bowel loop, and multiloculation was noted mainly with cystic lymphangiomas or pseudocysts. The diagnostic and surgical management of these lesions are briefly reviewed and their US appearance is illustrated. 相似文献
12.
13.
John Jenn-Yenn Lu Chi-Chia Cheng Shieu-Ming Chou Chang-Bor Hor Yi-Chen Yang Hsiang-Ling Wang 《Vaccine》2009
The first universal hepatitis B vaccination program for newborns in the world was launched in Taiwan in July 1984. Most studies on the effectiveness of hepatitis B vaccination focused on the seroprevalence of HBs Ag among children under 14 years old. Only few studies focused on the seropositivity of anti-HBs among adolescents aged 15–18 years old. The present study aimed to evaluate the impact of the nationwide hepatitis B vaccination program on the immunity to HBV infection and the necessity of boost among adolescents. In this study including eight annual seroprevalence surveys from 2000 to 2007, 2342 college entrants (1589 15-year-olds in group I and 753 18-year-olds in group II) and 1851 university freshmen (18-year-olds in group III) participated. Subjects identified anti-HBs, HBs Ag and anti-HBc negative were given boost three doses of HBV vaccine. The HBs Ag seroprevalence was 11.6%, 3.5% and 1.0% for participants who were born before 1984, 1984–1986 and after 1986. The anti-HBs-seropositive rates were significantly higher in group II (83.1%) than in group I (53.0%) and group III (53.5%). All 572 participants who were seronegative for anti-HBs, HBs Ag and anti-HBc became anti-HBs-seropositive after catch-up vaccination. It is concluded that the anti-HBs-seropositive rate decreased to 50% in 15 years after vaccination, and boost vaccination was 100% effective. The necessity and age for boost among anti-HBs negative adolescents and the timing of the first immunization should be further evaluated. 相似文献
14.
Limitations of the Panoramic 200 Optomap. 总被引:7,自引:0,他引:7
Brian Chou 《Optometry and vision science》2003,80(10):671-672
15.
16.
Extrarenal Wilms tumor occurring in the inguinal canal 总被引:2,自引:0,他引:2
We report an unusual case of extrarenal Wilms tumor discovered incidentally during routine inguinal orchiopexy. The world literature and embryological implications of Wilms tumor in the inguinal canal are reviewed. 相似文献
17.
Hsiu Hui Chiu Hsiao Hui Chou Wen Dar Jean Wung Yang Shieh 《Journal of microbiology, immunology, and infection》2007,40(1):14-23
BACKGROUND AND PURPOSE: Marine luminous bacteria were isolated and identified from samples in shallow coastal waters of Taiwan during the relatively warm seasons. METHODS: Identification of the luminous isolates was performed based on differences of phenotypic and genotypic characteristics together with data from phylogenetic analysis. RESULTS: Twenty seven strains of marine luminous bacteria were isolated. They were divided into five types based on differences of phenotypic characteristics. However, they could be clustered into only two genotypes according to the analysis of restriction patterns of polymerase chain reaction-amplified 16S rRNA genes digested with various restriction enzymes. The characterization data together with the 16S rRNA gene-based phylogenetic analysis revealed that the isolates included in phenotype I (seven isolates) could be Photobacterium leiognathi, and those included in phenotypes II-V (twenty isolates) might be classified as Vibrio harveyi. However, phylogeny based on gyrB sequences indicated that phenotypes II-V could be classified into two species, V. harveyi and Vibrio campbellii. CONCLUSION: Culturable luminous bacteria in the shallow coastal waters of Taiwan during the sampling period are dominated by V. harveyi/campbellii and P. leiognathi, and the former species appeared to be more prevalent and numerous than the latter species in general. 相似文献
18.
Shah-Hwa Chou Eing-Long Kao Chien-Chih Lin Meei-Feng Huang 《Clinical autonomic research》2006,16(3):240-242
A total of 114 patients with various sympathetic disorders underwent endoscopic sympathetic block over different thoracic
ganglions by the clipping method. The advantages of this method include the recognition of the clipped level, changeability,
and reversibility. However, 4.4% of patients were unilaterally clipped at the wrong level. 相似文献
19.
20.
Three cases of proved peritoneal carcinomatosis were examined by magnetic resonance imaging (MRI). Air was used to distend the entire gastrointestinal tract via an antegrade method. The findings included seedings along the small intestine, transverse and sigmoid colon, stellate pattern in the mesentery, plaque-like and bulky tumor masses in the mesentery and greater omentum, and focal thickenings along the right subdiaphragmatic parietal peritoneum. Stenosis caused by tumor encasement at the duodenojejunal junction and ileocolic anastomosis were first detected by MRI and later confirmed by barium studies. Ascites was present in all cases. One case showed ascites located only along the left paracolic gutter. This report shows that MRI is also able to demonstrate peritoneal carcinomatosis by using air as a gastrointestinal contrast medium. 相似文献