全文获取类型
收费全文 | 1393篇 |
免费 | 100篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 64篇 |
妇产科学 | 58篇 |
基础医学 | 184篇 |
口腔科学 | 45篇 |
临床医学 | 181篇 |
内科学 | 230篇 |
皮肤病学 | 70篇 |
神经病学 | 139篇 |
特种医学 | 67篇 |
外科学 | 139篇 |
综合类 | 15篇 |
预防医学 | 125篇 |
眼科学 | 23篇 |
药学 | 93篇 |
肿瘤学 | 61篇 |
出版年
2021年 | 26篇 |
2020年 | 11篇 |
2019年 | 23篇 |
2018年 | 19篇 |
2017年 | 23篇 |
2016年 | 25篇 |
2015年 | 29篇 |
2014年 | 40篇 |
2013年 | 39篇 |
2012年 | 49篇 |
2011年 | 62篇 |
2010年 | 34篇 |
2009年 | 44篇 |
2008年 | 54篇 |
2007年 | 58篇 |
2006年 | 47篇 |
2005年 | 51篇 |
2004年 | 37篇 |
2003年 | 50篇 |
2002年 | 55篇 |
2001年 | 56篇 |
2000年 | 44篇 |
1999年 | 37篇 |
1998年 | 20篇 |
1997年 | 30篇 |
1996年 | 12篇 |
1995年 | 17篇 |
1994年 | 13篇 |
1993年 | 14篇 |
1992年 | 28篇 |
1991年 | 29篇 |
1990年 | 24篇 |
1989年 | 26篇 |
1988年 | 27篇 |
1987年 | 19篇 |
1986年 | 16篇 |
1985年 | 37篇 |
1984年 | 21篇 |
1983年 | 25篇 |
1982年 | 14篇 |
1981年 | 12篇 |
1979年 | 18篇 |
1978年 | 10篇 |
1977年 | 13篇 |
1976年 | 17篇 |
1975年 | 11篇 |
1974年 | 12篇 |
1973年 | 11篇 |
1967年 | 9篇 |
1966年 | 10篇 |
排序方式: 共有1501条查询结果,搜索用时 15 毫秒
1.
R W Hertle A B Leahey S Bloom D B Schaffer S Bartlett 《Ophthalmic plastic and reconstructive surgery》1990,6(4):278-282
Chorioretinal folds have been reported as a result of many intraocular and extraocular inflammatory processes or tumors. Visual loss is usually secondary to a combination of the underlying process and chorioretinal folds involving the macula. We report a patient who developed decreased vision, metamorphopsia, chorioretinal folds, and a lamellar macular hole secondary to global compression by a bone fragment. The chorioretinal folds regressed and his vision stabilized following surgical decompression. Chorioretinal folds and lamellar macular hold formation are previously unrecognized complications of reconstructive craniofacial surgery. 相似文献
2.
3.
M C L'Huillier D Steschenko D Olive J L Bernard C Raybaud P Schaffer 《Revue d'épidémiologie et de santé publique》1988,36(4-5):301-308
Following the well-known European CCRs of Manchester and Turin, 2 regional CCRs have been recently created in France: in Nancy (1983) and Marseille (1984); both are population based CCRs, covering respectively 535,200 and 809,200 children (0-14 yrs). All malignant neoplasms are included, as well as brain tumours (whatever grading) and borderline malignancies. Data are collected from medical and administrative sources. Registration is active and every source is recontacted annually. The registries contact all physicians who might include children among their patients (private and hospital practice), and laboratories of pathology-cytology. The University Hospital Centers and Anti-Cancer Centers in adjacent regions, and in Paris are contacted. Death certificates for children dying of a malignant neoplasm are also sent to the registry. Data collected are as follows: name, age, sex, address, date and method of diagnosis, histological type, anatomical site, stage, treatment and sources of information. We added the data of a general cancer registry, created in Strasbourg in 1975 and covering 205,900 children. reliability of the methodology is attested by the similarity of the results obtained in other European, US and Australian CCRs. In conclusion, this type of registry is needed to organize multicentric epidemiological studies about the role of etiological factors, the survival, and the long term sequelae. 相似文献
4.
P Douste-Blazy J B Ruidavets D Arveiller A Bingham M A Aby R Camare P Schaffer J L Richard 《Revue d'épidémiologie et de santé publique》1988,36(4-5):342-349
Cardiovascular risk factors were studied from 1985 to 1987 in two population samples from the French regions of the Bas-Rhin (BR) (Strasbourg) and the Haute-Garonne (HG) (Toulouse). 1,257 men and women in the BR and 1,323 in the HG, aged 35-64, participated in the survey. A common investigation methodology in harmony with the MONICA protocol, was used. The mean weight was higher among the male (5 kg) and female (6 kg) populations living in the BR than in the HG. Even after age, body mass index and tobacco consumption adjustments, arterial systolic blood pressure was higher in the male population of the BR (145 mm Hg) than in the HG (133 mm Hg). Similar differences were observed among the female population. A higher proportion of hypertensive subjects whatever the sex and the age group was noted in the BR. The proportion of smokers, and the quantity of tobacco they smoked, did not differ between the two centers. Adjusted total cholesterolemia was higher in the HG, with mean differences of 0.32 mmol/l among the men and 0.35 mmol/l among the women. In the case of HDL cholesterol, the differences were 0.23 mmol/l among the men and 0.34 mmol/l among the women, explaining in large part the differences of the mean levels of total cholesterol. 相似文献
5.
Ketai LH; Williamson MR; Telepak RJ; Levy H; Koster FT; Nolte KB; Allen SE 《Radiology》1994,191(3):665
6.
A peer tutorial programme which is available to all first- and second-year medical students has been in operation at Case Western Reserve University School of Medicine since 1972. A retrospective study of the classes of 1982, 1983 and 1984 was undertaken to assess the participation levels in the tutorial programme and to compare the participation level to available performance parameters. The analysis revealed that 54% of the first-year classes and 22% of the second-year classes participated in the peer tutorial programme. X2 analysis of the data demonstrated that the relationship between participation in the tutorial programme and performance on examinations reached statistical significance. The results suggested that an open peer tutorial programme responded to the needs, both cognitive and affective, of medical students. 相似文献
7.
We have recently treated two patients with closed pronation-external rotation bimalleolar ankle fractures. During the surgical explorations, an avulsion type rupture of the posterior tibial tendon was observed. Open reduction and internal fixation of the fracture in conjunction with primary tendon repair has produced excellent clinical results. We wish to report these two cases of this uncommon injury. More important, we wish to point out the association of the tendon rupture in conjunction with a particular type of fracture pattern. 相似文献
8.
9.
10.
Assessment of the epidemic potential of a new strain of rotavirus associated with the novel G9 serotype which caused an outbreak in the United States for the first time in the 1995-1996 season
下载免费PDF全文
![点击此处可从《Journal of clinical microbiology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Clark HF Lawley DA Schaffer A Patacsil JM Marcello AE Glass RI Jain V Gentsch J 《Journal of clinical microbiology》2004,42(4):1434-1438
Rotavirus causes severe morbidity in developed countries and frequent deaths (> or = 500,000 per year) in less-developed countries. Historically, four serotypes--G1, G2, G3, and G4-have predominated; they are distinguished by one of two surface neutralization antigens (VP7). However, in 1983 and 1984 we described a new rotavirus serotype, designated G9, in five children hospitalized for diarrhea in Philadelphia, Pa. G9 rotavirus was not identified again in the Western Hemisphere until it caused ca. 50% of the rotavirus disease detected in Philadelphia in the 1995-1996 season. This outbreak allowed us to question whether a rotavirus strain completely new to a well-studied community would target either very young infants or older children, cause especially severe disease, or completely displace previously extant serotypes. We observed a significant excess of G9 infections in younger infants (especially in those < 6 months old) that might be attributed to the lack of G9-specific antibodies in mothers. Of further note, six of the seven oldest patients with rotavirus diarrhea were infected with the G9 strains (not significant). However, the age distribution of children with rotavirus did not differ over a 5-year study period regardless of the infecting serotype. Patients with diarrhea associated with G9 strains did not have disease more severe than that caused by the G1, G2, or G3 serotype. G9 strains did not displace the other serotypes but were virtually completely replaced by G1 or G2 serotypes in the three subsequent rotavirus seasons. We conclude that the abrupt appearance of this novel rotavirus serotype did not present a special threat to public health in the community. 相似文献