全文获取类型
收费全文 | 1394篇 |
免费 | 62篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 70篇 |
妇产科学 | 10篇 |
基础医学 | 171篇 |
口腔科学 | 23篇 |
临床医学 | 226篇 |
内科学 | 320篇 |
皮肤病学 | 35篇 |
神经病学 | 50篇 |
特种医学 | 300篇 |
外科学 | 127篇 |
综合类 | 26篇 |
预防医学 | 29篇 |
眼科学 | 6篇 |
药学 | 78篇 |
肿瘤学 | 65篇 |
出版年
2023年 | 2篇 |
2021年 | 12篇 |
2020年 | 5篇 |
2019年 | 18篇 |
2018年 | 12篇 |
2017年 | 12篇 |
2016年 | 11篇 |
2015年 | 21篇 |
2014年 | 14篇 |
2013年 | 31篇 |
2012年 | 16篇 |
2011年 | 19篇 |
2010年 | 49篇 |
2009年 | 49篇 |
2008年 | 23篇 |
2007年 | 61篇 |
2006年 | 27篇 |
2005年 | 37篇 |
2004年 | 23篇 |
2003年 | 17篇 |
2002年 | 27篇 |
2001年 | 20篇 |
2000年 | 26篇 |
1999年 | 28篇 |
1998年 | 97篇 |
1997年 | 89篇 |
1996年 | 110篇 |
1995年 | 85篇 |
1994年 | 89篇 |
1993年 | 75篇 |
1992年 | 30篇 |
1991年 | 40篇 |
1990年 | 38篇 |
1989年 | 40篇 |
1988年 | 39篇 |
1987年 | 29篇 |
1986年 | 35篇 |
1985年 | 32篇 |
1984年 | 14篇 |
1983年 | 22篇 |
1982年 | 20篇 |
1981年 | 21篇 |
1980年 | 17篇 |
1979年 | 5篇 |
1978年 | 9篇 |
1977年 | 14篇 |
1976年 | 14篇 |
1975年 | 7篇 |
1969年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1537条查询结果,搜索用时 62 毫秒
91.
92.
Injuries to peripheral nerves are common and cause life-changing problems for patients alongside high social and health care costs for society. Current clinical treatment of peripheral nerve injuries predominantly relies on sacrificing a section of nerve from elsewhere in the body to provide a graft at the injury site. Much work has been done to develop a bioengineered nerve graft, precluding sacrifice of a functional nerve. Stem cells are prime candidates as accelerators of regeneration in these nerve grafts. This review examines the potential of adipose-derived stem cells to improve nerve repair assisted by bioengineered nerve grafts. 相似文献
93.
94.
José GM Hofhuis Henk F van Stel Augustinus JP Schrijvers Johannes H Rommes Jan Bakker Peter E Spronk 《Critical care (London, England)》2009,13(1):118-3
During recent years increasing attention has been given to the quality of survival in critical care. Health-related quality
of life (HRQOL) is an important issue both for patients and their families. Furthermore, admission to the intensive care unit
can have adverse psychological effects in critically ill patients. Recent studies conducted in critically ill patients have
measured HRQOL. However, usually absent from such reports are evaluations of conceptual issues, addressing factors such as
why HRQOL should be measured in critically ill patients, how to define and standardize domains of HRQOL, whether proxies can
provide useful information about HRQOL in critically ill patients, whether response shift occurs in critically ill patients,
and whether post-traumatic stress disorder (PTSD) occurs in critically ill patients. Some studies reported moderate agreement
between patients and their proxies, although lower levels of agreement may be reported for psychosocial or physical functioning.
Response shift (adaptation and change in perception) appears to be an important phenomenon and likely to be present, but it
is seldom measured when estimating HRQOL in critically ill patients. Furthermore, vigilance for symptoms of PTSD and early
interventions to prevent PTSD are needed. 相似文献
95.
96.
97.
A Lacout M El Hajjam C Julie P Lacombe JP Pelage 《Journal of Medical Imaging and Radiation Oncology》2008,52(6):580-582
We report the case of a patient with a single liver metastasis of a mucinous colonic carcinoma that mimics a haemangioma in T2‐weighted sequences. Although a very high T2 signal in non‐cystic lesions is highly specific for the diagnostic of haemangioma, the use of gadolinium‐enhancement MRI is recommended. In patients with a history of neoplasia, the diagnosis of benign liver nodules should be made with caution. 相似文献
98.
Interstitial deletion of the short arm of chromosome 20 in arteriohepatic dysplasia (Alagille syndrome) 总被引:7,自引:0,他引:7
F Zhang J F Deleuze A Aurias A M Dutrillaux R N Hugon D Alagille G Thomas M Hadchouel 《The Journal of pediatrics》1990,116(1):73-77
An autosomal dominant transmission of arteriohepatic dysplasia, or Alagille syndrome, with reduced penetrance and variable expressivity has been suggested from familial pedigrees, but the nature of the genetic defect and its chromosomal localization are not firmly established. We report the case of an 8-year-old boy with arteriohepatic dysplasia, in whom high-resolution chromosome study showed a partial deletion of the short arm of chromosome 20, which encompasses subbands p11.23 to p12.3. In situ hybridization and Southern blotting localized four restriction fragment length polymorphism probes within the deletion and another one distal to the deletion. Because one patient has already been reported to have arteriohepatic dysplasia and deletion of the short arm of chromosome 20, and six additional patients with such a deletion had major features of Alagille syndrome, this syndrome should now be assigned to chromosome 20p. 相似文献
99.
100.
The frequency of reversible and irreversible visual impairment was determined in children with severe and profound sensorineural deafness, as subnormal vision can adversely affect their educational and social development. Eighty three of 87 such children attending an audiology service were examined to assess the incidence and severity of visual impairment. Each child underwent a detailed ophthalmic assessment. The criteria for visual impairment were visual acuity < 6/9 Snellen or equivalent and/or abnormal binocular vision. Forty five had a normal ophthalmic examination (54.2%). Twenty nine had visual impairment (34.9%) and nine had ophthalmological abnormalities that did not interfere with vision (10.9%). A higher proportion of children with risk factors for visual pathology demonstrated visual impairment than those in whom there were no risk factors. None the less, 44% of visual impairment was among patients without risk factors. The results underline the need to examine all children with severe and profound sensorineural deafness soon after diagnosis and indicate that children with multiple handicaps have a greater likelihood of visual impairment (11 of 14 cases). 相似文献