全文获取类型
收费全文 | 42772篇 |
免费 | 1977篇 |
国内免费 | 199篇 |
专业分类
耳鼻咽喉 | 559篇 |
儿科学 | 897篇 |
妇产科学 | 470篇 |
基础医学 | 5548篇 |
口腔科学 | 1274篇 |
临床医学 | 2901篇 |
内科学 | 10130篇 |
皮肤病学 | 936篇 |
神经病学 | 3987篇 |
特种医学 | 1998篇 |
外国民族医学 | 1篇 |
外科学 | 6372篇 |
综合类 | 141篇 |
一般理论 | 6篇 |
预防医学 | 1296篇 |
眼科学 | 835篇 |
药学 | 2896篇 |
中国医学 | 112篇 |
肿瘤学 | 4589篇 |
出版年
2023年 | 216篇 |
2022年 | 385篇 |
2021年 | 708篇 |
2020年 | 388篇 |
2019年 | 526篇 |
2018年 | 674篇 |
2017年 | 559篇 |
2016年 | 726篇 |
2015年 | 697篇 |
2014年 | 925篇 |
2013年 | 1153篇 |
2012年 | 1927篇 |
2011年 | 1970篇 |
2010年 | 1187篇 |
2009年 | 1031篇 |
2008年 | 1852篇 |
2007年 | 2162篇 |
2006年 | 1983篇 |
2005年 | 1974篇 |
2004年 | 2021篇 |
2003年 | 1931篇 |
2002年 | 2021篇 |
2001年 | 1398篇 |
2000年 | 1465篇 |
1999年 | 1394篇 |
1998年 | 621篇 |
1997年 | 484篇 |
1996年 | 490篇 |
1995年 | 413篇 |
1994年 | 427篇 |
1993年 | 405篇 |
1992年 | 1072篇 |
1991年 | 923篇 |
1990年 | 879篇 |
1989年 | 873篇 |
1988年 | 801篇 |
1987年 | 797篇 |
1986年 | 705篇 |
1985年 | 655篇 |
1984年 | 468篇 |
1983年 | 384篇 |
1982年 | 202篇 |
1981年 | 181篇 |
1979年 | 325篇 |
1978年 | 221篇 |
1977年 | 196篇 |
1974年 | 204篇 |
1973年 | 177篇 |
1971年 | 190篇 |
1969年 | 186篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Lp(a) lipoprotein in cerebrovascular disease and dementia 总被引:1,自引:0,他引:1
Lp(a) lipoprotein has been considered an independent risk factor in the development of coronary heart disease (CHD). We examined the role of Lp(a) in patients with cerebrovascular disease (CVD) and those with dementia. The Lp(a) concentration in patients with CHD, those with cerebral infarction due to a large artery occlusion and those with vascular dementia (VD) was significantly higher than that of age-matched control subjects. However, the Lp(a) concentration was not high in cerebral infarction due to a small artery occlusion, intracerebral hemorrhage and dementia of the Alzheimer type (DAT). The present results suggest that Lp(a) should cause VD as well as CVD, and that Lp(a) should be one of the indicators that distinguish VD from DAT. 相似文献
63.
64.
N Sadatoh H Hatabu M Takahashi K Imanaka A Sano 《Journal of computer assisted tomography》1987,11(4):742-744
To achieve prolonged breath-holding, oxygen was administered just before dynamic CT and high resolution lung CT. Oxygen administration has proved to be a supportive means to improve the quality of CT studies. 相似文献
65.
66.
Yutaka Saito Takahisa Matsuda Tsuyoshi Kikuchi Hisatomo Ikehara Toshio Uraoka 《Digestive endoscopy》2007,19(Z1):S34-S39
Endoscopic submucosal dissection (ESD) for colorectal cancer is not widely accepted because of its technical difficulty and the risk of perforation. In addition, the risk of peritonitis cannot be completely eliminated even if a perforation is closed successfully. Reported here are two cases of early colon cancer in which the patients sustained iatrogenic perforations of the ascending colon during conventional endoscopic mucosal resection and of the sigmoid colon during ESD, respectively, requiring abdominal decompression with an 18 G Medicut needle. Both of these perforations were successfully treated by endoscopic clipping. In conclusion, conservative medical management may be possible in patients who have undergone successful closure of colonic perforations using endoscopic clipping. In order to perform immediate endoscopic closure, abdominal decompression has been useful to decrease patient discomfort and colonic lumen collapse. Now, CO2 insufflation is being used effectively for the prevention of pneumoperitoneum. 相似文献
67.
68.
Hironori Nakagami Yasushi Kikuchi Tomohiro Katsuya Ryuichi Morishita Hiroshi Akasaka Shigeyuki Saitoh Hiromi Rakugi Yasufumi Kaneda Kazuaki Shimamoto Toshio Ogihara 《Hypertension research》2007,30(12):1239-1246
We examined a gene polymorphism of a novel Z-disc-related protein, myospryn (cardiomyopathy-associated 5). We focused on one haplotype block associated with a tag single nucleotide polymorphism (SNP) that covered 16 of 27 coding SNPs with linkage disequilibrium (minor allele frequency 0.413). Screening a myospryn polymorphism (K2906N) in a general health check-up of a rural Japanese population revealed an association with cardiac diseases (p=0.0082). In further analysis of the interaction between K2906N and cardiac function in patients, K2906N was associated with the anteroseptal wall thickness of the left ventricle in a recessive model (p=0.0324) and with the ratio of the peak velocity of the early diastolic filling wave to the peak velocity of atrial filling (A/E) (p=0.0278). In an association study based on left ventricular wall thickness, we found a significant difference in the K2906N genotype between controls and patients with cardiac hypertrophy. These results suggest that the K2906N polymorphism could be clinically associated with left ventricular hypertrophy and diastolic dysfunction independent of known parameters. Although the precise mechanism underlying this association remains to be elucidated, treatment with angiotensin II induced an increase in heart myospryn mRNA level in vitro and in vivo. Our results suggest that the polymorphism of myospryn is associated with left ventricular hypertrophy, and an association between a Z-disc protein and cardiac adaptation in response to pressure overload. 相似文献
69.
Naoko Masuzawa Mitsuo Kishimoto Yoshiki Takahashi 《International journal of gynecological pathology》2003,22(3):285-288
A 57-year-old female presented with an abnormal Pap smear. Colposcopic examination of the cervix revealed white mucosa with erosion and several areas of black pigmentation. After a colposcopically directed biopsy and loop conization, radical hysterectomy and bilateral salpingo-oophorectomy with pelvic and paraaortic lymphadenectomy were performed. Pathological examination disclosed an invasive squamous cell carcinoma admixed with many dendritic melanocytes. Melanin granules were present within the melanocytes and tumor cells. Although similar tumors have been reported in other sites, this is the first report to our knowledge of a pigmented squamous cell carcinoma of the uterine cervix. 相似文献