全文获取类型
收费全文 | 201044篇 |
免费 | 34709篇 |
国内免费 | 2731篇 |
专业分类
耳鼻咽喉 | 5582篇 |
儿科学 | 6279篇 |
妇产科学 | 3155篇 |
基础医学 | 10071篇 |
口腔科学 | 2804篇 |
临床医学 | 29639篇 |
内科学 | 59827篇 |
皮肤病学 | 8496篇 |
神经病学 | 18675篇 |
特种医学 | 8277篇 |
外科学 | 49599篇 |
综合类 | 450篇 |
现状与发展 | 72篇 |
一般理论 | 6篇 |
预防医学 | 8504篇 |
眼科学 | 4303篇 |
药学 | 4085篇 |
中国医学 | 148篇 |
肿瘤学 | 18512篇 |
出版年
2024年 | 708篇 |
2023年 | 5013篇 |
2022年 | 1845篇 |
2021年 | 4152篇 |
2020年 | 6565篇 |
2019年 | 2960篇 |
2018年 | 8383篇 |
2017年 | 8126篇 |
2016年 | 9326篇 |
2015年 | 9388篇 |
2014年 | 16765篇 |
2013年 | 17279篇 |
2012年 | 8263篇 |
2011年 | 8668篇 |
2010年 | 12079篇 |
2009年 | 15641篇 |
2008年 | 8500篇 |
2007年 | 7080篇 |
2006年 | 9365篇 |
2005年 | 6786篇 |
2004年 | 5967篇 |
2003年 | 4964篇 |
2002年 | 5112篇 |
2001年 | 4734篇 |
2000年 | 3978篇 |
1999年 | 4243篇 |
1998年 | 4406篇 |
1997年 | 4066篇 |
1996年 | 3938篇 |
1995年 | 3722篇 |
1994年 | 2428篇 |
1993年 | 1998篇 |
1992年 | 2185篇 |
1991年 | 2108篇 |
1990年 | 1742篇 |
1989年 | 1859篇 |
1988年 | 1623篇 |
1987年 | 1419篇 |
1986年 | 1401篇 |
1985年 | 1224篇 |
1984年 | 887篇 |
1983年 | 803篇 |
1982年 | 666篇 |
1981年 | 565篇 |
1980年 | 517篇 |
1979年 | 592篇 |
1978年 | 491篇 |
1977年 | 524篇 |
1975年 | 398篇 |
1972年 | 398篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
Takashi Murakami Naoto Sakamoto Akihito Nagahara 《Journal of gastroenterology and hepatology》2019,34(10):1685-1695
Sessile serrated adenoma/polyps (SSA/Ps) are early precursor lesions in the serrated neoplasia pathway, which results in BRAF‐mutated colorectal carcinomas with not only high levels of microsatellite instability but also microsatellite stable. SSA/Ps with advanced histology, including cytological dysplasia or minimally invasive carcinomas, are important lesions because SSA/Ps are considered major contributors to “interval cancers” and these lesions can rapidly become dysplastic or invasive carcinomas. Clinicopathologically, SSA/Ps with dysplasia or invasive carcinoma were associated with advanced age, female sex, and proximal colon. Although SSA/Ps with submucosal invasive carcinoma were smaller and invaded less deeply into the submucosal layer than conventional tubular adenomas with submucosal invasive carcinoma, SSA/Ps with submucosal invasive carcinoma frequently had a mucinous component and exhibited a higher potential for lymphatic invasion and lymph node metastasis. In an SSA/P series, endoscopic characteristics, including (semi)pedunculated morphology, double elevation, central depression, and reddishness, may help accurately diagnose SSA/Ps with advanced histology. Removal of SSA/Ps with dysplasia or invasive carcinoma was recommended. Endoscopic treatment such as endoscopic mucosal resection or endoscopic submucosal dissection is useful for those lesions. However, surgical resection with lymph node dissection might be indicated when SSA/Ps with invasive carcinoma are endoscopically suspected, because these have the high risk of lymph node metastasis. Greater awareness may promote further research into improving the detection, recognition, and complete resection rates of SSA/Ps with dysplasia or invasive carcinoma and reduce the interval cancer rates. 相似文献
74.
75.
Worsening pneumonitis due to a pharmacokinetic drug–drug interaction between everolimus and voriconazole in a renal transplant patient
下载免费PDF全文
![点击此处可从《Journal of clinical pharmacy and therapeutics》网站下载免费的PDF全文](/ch/ext_images/free.gif)
76.
77.
78.
Kota Sahara Rin Yamada Takashi Fujiwara Koichi Koizumi Shin‐ichiro Horiguchi Tsunekazu Hishima Tatsuro Yamaguchi 《Digestive endoscopy》2015,27(7):768-771
Idiopathic myointimal hyperplasia of mesenteric veins (IMHMV) is a rare and poorly understood ischemic colitis that occurs in the rectosigmoid colon of predominantly young, previously healthy, male patients. A 76‐year‐old Japanese man presented to our hospital with a 1‐year history of worsening diarrhea, lower abdominal pain, and weight loss (−6 kg). Laboratory evaluation revealed white blood cell count of 13 200/μL, C‐reactive protein level of 2.0 mg/dL (normal range, 0.0–0.3), and negative results for stool culture (including Clostridium difficile). Colonoscopy showed circumferential and edematous narrowing of the sigmoid colon with deep longitude ulceration. Biopsy was done and examination of the specimen demonstrated no specific ischemia. The patient was treated with bowel rest, antibiotics, and i.v. fluids; however, his symptoms worsened. Finally, sigmoidectomy was carried out. Histological examination demonstrated significant myointimal hyperplasia of mesenteric veins leading to thickening and stenosis of the venous lumen. Therefore, the final diagnosis was IMHMV. Three months following sigmoidectomy, he was asymptomatic. 相似文献
79.
80.
Yosuke Homma Takashi Shiga Hiraku Funakoshi Dai Miyazaki Atsushi Sakurai Yoshio Tahara Ken Nagao Naohiro Yonemoto Arino Yaguchi Naoto Morimura 《The American journal of emergency medicine》2019,37(2):241-248