全文获取类型
收费全文 | 20540篇 |
免费 | 1892篇 |
国内免费 | 51篇 |
专业分类
耳鼻咽喉 | 284篇 |
儿科学 | 737篇 |
妇产科学 | 535篇 |
基础医学 | 3018篇 |
口腔科学 | 388篇 |
临床医学 | 2343篇 |
内科学 | 4105篇 |
皮肤病学 | 315篇 |
神经病学 | 1531篇 |
特种医学 | 940篇 |
外国民族医学 | 3篇 |
外科学 | 2553篇 |
综合类 | 529篇 |
一般理论 | 25篇 |
预防医学 | 2131篇 |
眼科学 | 267篇 |
药学 | 1586篇 |
1篇 | |
中国医学 | 8篇 |
肿瘤学 | 1184篇 |
出版年
2021年 | 279篇 |
2019年 | 281篇 |
2018年 | 294篇 |
2017年 | 217篇 |
2016年 | 253篇 |
2015年 | 310篇 |
2014年 | 443篇 |
2013年 | 672篇 |
2012年 | 846篇 |
2011年 | 927篇 |
2010年 | 527篇 |
2009年 | 463篇 |
2008年 | 776篇 |
2007年 | 815篇 |
2006年 | 813篇 |
2005年 | 823篇 |
2004年 | 740篇 |
2003年 | 678篇 |
2002年 | 692篇 |
2001年 | 618篇 |
2000年 | 651篇 |
1999年 | 546篇 |
1998年 | 323篇 |
1997年 | 261篇 |
1996年 | 293篇 |
1995年 | 259篇 |
1994年 | 245篇 |
1993年 | 225篇 |
1992年 | 504篇 |
1991年 | 500篇 |
1990年 | 475篇 |
1989年 | 451篇 |
1988年 | 434篇 |
1987年 | 439篇 |
1986年 | 435篇 |
1985年 | 437篇 |
1984年 | 332篇 |
1983年 | 276篇 |
1982年 | 222篇 |
1981年 | 181篇 |
1980年 | 165篇 |
1979年 | 321篇 |
1978年 | 237篇 |
1977年 | 215篇 |
1976年 | 180篇 |
1975年 | 186篇 |
1974年 | 186篇 |
1973年 | 203篇 |
1972年 | 176篇 |
1971年 | 170篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Infantile Digital Fibroma Treated With Mohs Micrographic Surgery 总被引:2,自引:0,他引:2
John G. Albertini MD Maj USAF MC Michael Jude Welsch MD CPT USA MC Leo A. Conger MD LTC USA MC Lester F. Libow MD COL USA MC Dirk M. Elston MD COL USA MC 《Dermatologic surgery》2002,28(10):959-961
BACKGROUND: Infantile digital fibroma (IDF) is a rare benign fibrous tumor of childhood that frequently recurs despite local excision. Conservative, nonsurgical management may result in regression and/or joint deformity. OBJECTIVE: To describe the histologic features of IDF and discuss a case excised using Mohs micrographic surgery (MMS). METHODS: Case report and review of the clinical, histologic, and ultrastructural features. RESULTS: Characteristic inclusion bodies of actin were identified with hematoxylin and eosin, Masson's trichrome, and rapid actin immunostain. The tumor was debulked and the majority was removed after one stage of MMS, except where the deep margin approached the joint space. The defect healed by secondary intention. At 2 years the patient had no recurrence or functional joint deformity. CONCLUSION: MMS is a surgical treatment option for IDF. 相似文献
13.
14.
Hong Wang Venkatraman Siddharthan Jeffery O. Hall John D. Morrey 《Journal of neurovirology》2009,15(4):293-299
Prior findings led us to hypothesize that West Nile virus (WNV) preferentially transports along motor axons instead of sensory
axons. WNV is known to undergo axonal transport in cell culture and in infected hamsters to infect motor neurons in the spinal
cord. To investigate this hypothesis, WNV was injected directly into the left sciatic nerve of hamsters. WNV envelope-staining
in these hamsters was only observed in motor neurons of the ipsilateral ventral horn of the spinal cord, but not in the dorsal
root ganglion (DRG). To evaluate the consequence of motor neuron infection by WNV, the authors inoculated wheat germ agglutinin—horseradish
peroxidase (WGA-HRP) 9 days after WNV sciatic nerve injection, and stained the spinal cord and the DRG for HRP activity 3
days later. The degree of HRP-staining in DRG was the same in WNV- and sham-infected animals, but the HRP-staining in the
motor neuron in the ventral horn was considerably less for WNV-infected hamsters. To investigate the mechanism of WNV transport,
hamsters were treated with colchicine, an inhibitor of membranous microtubule-mediated transport. The intensity of the WNV-stained
area in the spinal cord of colchicine-treated hamsters at 6 days after WNV infection were significantly reduced (P≤.05) compared to the placebo-treated hamsters. These data suggest that WNV is preferentially transported through the motor
axons, but not the sensory axons, to subsequently infect motor neurons and cause motor weakness and paralysis. 相似文献
15.
16.
Increased risk of cancer at multiple sites after gastric surgery for peptic ulcer. 总被引:9,自引:1,他引:8 下载免费PDF全文
Of 5018 patients who had undergone gastric surgery at St James Hospital, Balham, at least 25 years ago, death certificates have been received for 2768, whilst 1746 patients are still alive and are flagged (Office of Populations, Censuses and Surveys (OPCS) will notify us of their death and its cause) and only 504 could not be traced. Mortality from cancers of various organs has been determined using a 'years at risk' calculation in five year bands. There was no increase in mortality risk from any cancers during the first 15 postoperative years, but from 20 years after operation there was a significant excess risk not only of cancer of the stomach (4.5-fold), but also of the large bowel (1.6-fold), bronchus (3.9-fold), pancreas (4.0-fold), biliary tract (9.1-fold), oesophagus (2.3-fold), bladder (2.4-fold), breast (4.0-fold), and cancer of all sites (3.3-fold). These findings are consistent with the production in the operated-upon stomach of circulating carcinogens with a 20 year latency period. 相似文献
17.
S M Hall 《Journal of the Royal Society of Medicine》1986,79(10):596-598
18.
The routine manual encoding of pathological data, using the SNOP and SNOMED systems at two London teaching hospitals, was reviewed. The error rates in the two departments were compared and the causes analysed. The relative merits of SNOP and SNOMED were considered. Methods to optimise the efficiency of manual encoding are suggested and the importance of accuracy in coding is emphasised. 相似文献
19.
20.