全文获取类型
收费全文 | 1337451篇 |
免费 | 94400篇 |
国内免费 | 2916篇 |
专业分类
耳鼻咽喉 | 19756篇 |
儿科学 | 40253篇 |
妇产科学 | 38672篇 |
基础医学 | 187350篇 |
口腔科学 | 39852篇 |
临床医学 | 112730篇 |
内科学 | 262787篇 |
皮肤病学 | 30276篇 |
神经病学 | 106407篇 |
特种医学 | 53702篇 |
外国民族医学 | 435篇 |
外科学 | 208645篇 |
综合类 | 31052篇 |
现状与发展 | 6篇 |
一般理论 | 436篇 |
预防医学 | 92071篇 |
眼科学 | 31405篇 |
药学 | 100129篇 |
4篇 | |
中国医学 | 2989篇 |
肿瘤学 | 75810篇 |
出版年
2018年 | 11779篇 |
2015年 | 11903篇 |
2014年 | 16710篇 |
2013年 | 25278篇 |
2012年 | 33051篇 |
2011年 | 34920篇 |
2010年 | 20776篇 |
2009年 | 20269篇 |
2008年 | 33640篇 |
2007年 | 36746篇 |
2006年 | 37310篇 |
2005年 | 36098篇 |
2004年 | 35164篇 |
2003年 | 34134篇 |
2002年 | 33669篇 |
2001年 | 63672篇 |
2000年 | 65381篇 |
1999年 | 55461篇 |
1998年 | 14675篇 |
1997年 | 13480篇 |
1996年 | 12962篇 |
1995年 | 12245篇 |
1994年 | 11480篇 |
1992年 | 42797篇 |
1991年 | 41305篇 |
1990年 | 40582篇 |
1989年 | 39574篇 |
1988年 | 37003篇 |
1987年 | 36434篇 |
1986年 | 34928篇 |
1985年 | 33119篇 |
1984年 | 24837篇 |
1983年 | 21056篇 |
1982年 | 12670篇 |
1981年 | 11578篇 |
1980年 | 10775篇 |
1979年 | 23936篇 |
1978年 | 17078篇 |
1977年 | 14845篇 |
1976年 | 13395篇 |
1975年 | 15269篇 |
1974年 | 18088篇 |
1973年 | 17564篇 |
1972年 | 16817篇 |
1971年 | 15719篇 |
1970年 | 14919篇 |
1969年 | 14349篇 |
1968年 | 13461篇 |
1967年 | 12018篇 |
1966年 | 11261篇 |
排序方式: 共有10000条查询结果,搜索用时 6 毫秒
911.
K Nakajima H Bunko N Tonami K Hisada K Mukai T Misaki T Iwa 《Clinical nuclear medicine》1986,11(8):564-567
A case with congenitally corrected transposition of the great arteries associated with the pre-excitation syndrome is presented. A gated-blood-pool study and Tl-201 myocardial imaging were performed using SPECT. The tomographic gated-blood-pool images showed the shapes of the right ventricle (RV) and left ventricle (LV), i.e., anatomically LV and RV respectively, to be reversed from that of normal patients. The relationships of the great vessels and ventricles also were easily visualized. RV hypertrophy (anatomical LV) was visualized on the Tl-201 images. Phase analysis showed the earliest excitation was in the anteroseptal region near the base of the LV, which was consistent with the site of the accessory conduction pathway. The gated-blood-pool and Tl-201 tomographic studies were helpful for demonstrating the corrected transposition of the great arteries and the pre-excitation syndrome. 相似文献
912.
913.
914.
The investigation of AUSTROLIABUM CANDIDUM afforded, in addition to several known sesquiterpene lactones, four new ones, including three germacranolides with an ether bridge, as well as an unusual glucoside. The structures were elucidated by spectroscopic methods. 相似文献
915.
H Nakano 《Nippon Sanka Fujinka Gakkai zasshi》1987,39(3):497-501
916.
This teleconference has been held on a weekly basis (on Thursdayevenings) as a good opportunity for the discussion of importantissues in clinical oncology. Nowadays, this plenary meetingamong the major cancer centers is indispensable for maintainingthe high standard of quality of cancer clinics throughout Japan. Review (November, 2004) November 4: Treatment-resistant cervical cancer (moderated byDr Tanaka, 相似文献
917.
Prof. Dr. Dr. M. Höckel 《Der Onkologe》2006,12(9):901-907
Abdominal radical hysterectomy (Wertheim operation), currently the standard surgical treatment for cervical carcinoma, is based on historical ideas of the female pelvic anatomy and of locoregional tumor spread. Total mesometrial resection (TMMR) uses new insights derived from developmental biology for a new oncological concept of radicality, i.e. resection of a malignant tumor within the borders of the morphogenetic unit of its origin. The morphogenetic uterovaginal unit that relates to the local spread of cervical carcinoma can be deduced from the embryological and fetal development. Anatomical structures that do not belong to this tissue unit can be left in situ despite close proximity to the tumor. When combined with nerve-sparing therapeutic lymph node dissection, TMMR yields a high locoregional control rate without adjuvant radiotherapy and with relatively little treatment-related morbidity. 相似文献
918.
Several psychophysiological abnormalities associated with schizophrenia have been proposed as genetic trait markers of vulnerability to the disorder. Smooth pursuit eye tracking dysfunction and abnormal long latency event-related potentials are the most promising candidates. Both are independent of the effects of psychotropic medication or mental state at the time of testing, and twin studies demonstrate that each has a high level of heritability. Having recorded smooth pursuit eye tracking and event-related potentials in 20 high-density schizophrenic families, we find abnormalities in one or both measures in most of the families studied. The abnormalities, when present, occur in the family members with schizophrenia and other forms of functional psychosis, and they have a bimodal distribution with approximately half the nonschizophrenic relatives also showing eye tracking dysfunction and/or abnormal event-related potentials. Some of these relatives had psychiatric symptoms; others were normal. Our results suggest that psychophysiological examination can help to clarify the boundaries of schizophrenia spectrum disorder. By helping to decide the phenotypic status of nonschizophrenic family members, this should increase the power of DNA linkage studies. 相似文献
919.
Previously we have shown that the dorsal lateral geniculate body (LGB), which is strictly visual in sighted mammals, receives a strong auditory input in the naturally blind mole rat (Spalax ehrenbergi). Here we show with the 2-deoxyglucose technique and with single-unit recordings that in this species the initially non-degenerated visual cortex, as defined by its connection with LGB, is also activated by the auditory modality. These findings suggest that cross-modal compensation may occur as a natural consequence of the degeneration of a sense organ. 相似文献
920.
Follow up MRI study in first episode schizophrenia. 总被引:2,自引:0,他引:2
G Degreef M Ashtari H W Wu M Borenstein S Geisler J Lieberman 《Schizophrenia Research》1991,5(3):204-206