全文获取类型
收费全文 | 2293篇 |
免费 | 243篇 |
国内免费 | 28篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 160篇 |
妇产科学 | 50篇 |
基础医学 | 301篇 |
口腔科学 | 107篇 |
临床医学 | 219篇 |
内科学 | 450篇 |
皮肤病学 | 68篇 |
神经病学 | 110篇 |
特种医学 | 178篇 |
外科学 | 408篇 |
综合类 | 51篇 |
预防医学 | 171篇 |
眼科学 | 52篇 |
药学 | 80篇 |
中国医学 | 6篇 |
肿瘤学 | 137篇 |
出版年
2023年 | 19篇 |
2022年 | 19篇 |
2021年 | 26篇 |
2020年 | 36篇 |
2019年 | 31篇 |
2018年 | 78篇 |
2017年 | 70篇 |
2016年 | 62篇 |
2015年 | 83篇 |
2014年 | 91篇 |
2013年 | 136篇 |
2012年 | 95篇 |
2011年 | 84篇 |
2010年 | 103篇 |
2009年 | 121篇 |
2008年 | 64篇 |
2007年 | 84篇 |
2006年 | 98篇 |
2005年 | 86篇 |
2004年 | 59篇 |
2003年 | 55篇 |
2002年 | 56篇 |
2001年 | 40篇 |
2000年 | 34篇 |
1999年 | 45篇 |
1998年 | 102篇 |
1997年 | 89篇 |
1996年 | 102篇 |
1995年 | 64篇 |
1994年 | 77篇 |
1993年 | 42篇 |
1992年 | 28篇 |
1991年 | 31篇 |
1990年 | 22篇 |
1989年 | 38篇 |
1988年 | 34篇 |
1987年 | 37篇 |
1986年 | 31篇 |
1985年 | 30篇 |
1984年 | 14篇 |
1983年 | 13篇 |
1982年 | 22篇 |
1981年 | 15篇 |
1980年 | 20篇 |
1979年 | 9篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 13篇 |
1975年 | 9篇 |
1974年 | 5篇 |
排序方式: 共有2564条查询结果,搜索用时 0 毫秒
11.
12.
Rosenberg ZS; Jahss MH; Noto AM; Shereff MJ; Cheung Y; Frey CC; Norman A 《Radiology》1988,167(2):489-493
Computed tomography (CT) was performed in 42 patients with 49 clinically suspected tears of the posterior tibial tendon. Twenty-eight of the 49 suspected tears were subsequently surgically explored and repaired. Three patterns of tendon abnormalities were recognized on CT scans: type I-intact, hypertrophied, heterogeneous tendon; type II-attenuated tendon; and type III-absence of a portion of a tendon. Types I and II correlated with partial rupture seen during surgery, and type III correlated with complete rupture of the tendon. CT findings were accurate in 96% of the patients who underwent surgery. In four cases (14%), tendon rupture was seen on CT scans, but the extent of the injury was underestimated and the rupture was misclassified. Reactive periostitis of the distal tibia was seen in 71% of diseased tendons and may represent an important factor in the diagnosis of tendon rupture. 相似文献
13.
J. Sanchez Burson J. Graña Gil M. Rosales Rodriguez A. Atanes Sandoval C. Alonso Blanco F. Galdo Fernandez 《Clinical rheumatology》1992,11(2):261-264
Summary We have studied the characteristics of arthritis present in 32 patients with Behçet's disease (BD), and how this arthritis is related to the HLA markers class I. 84% of the patients presented arthritis, the most common being monoarthritis as the initial presentation, and oligoarthritis in subsequent episodes. In 63% of the cases, the development was in episodes of acute/subacute arthritis. We found statistically significant association between antigens B-5 and B-51, and the group with BD, with a relative risk of 3.89 and 4.71 respectively. The attempt to relate markers B-5, B-51 and B-27 to the presence of arthritis as well as to its manifestation and further development was not conclusive. 相似文献
14.
15.
M Durdu† S Gökçe‡ M Bagirova§ M Yalaz‡ AM Allahverdiyev§ S Uzun† 《Journal of the European Academy of Dermatology and Venereology》2007,21(2):214-218
OBJECTIVE: Although cutaneous leishmaniasis (CL) occurs mostly in the facial area, periocular involvement accounts for 2-5% of the facial lesions. CL lesions localized in the periocular region can easily be confused with various other diseases. The aim of this study was to examine the frequency of periocular involvement in CL in the Cukurova region of Turkey, as well as the clinical characteristics, diagnosis and methods of treatment of this disease. METHODS: Between December 1998 and December 2004, patients who were diagnosed with CL were evaluated prospectively with respect to periocular involvement. RESULTS: From the 2066 patients evaluated with CL, 2622 lesions were identified. In 59 (2.9%) of these patients, a total of 66 (2.5%) lesions were located in the periocular area. Thirty-two (48.5%) of these lesions were of the papular type, 15 (22.7%) the nodulo-ulcerative type, 10 (15.2%) the plaque type, and nine (13.6%) the nodular type. Dacryocystitis was identified in four patients with periocular involvement. Over the follow-up period, no ocular or periocular deformities or complications developed in these patients. CONCLUSION: Patients suspected of CL should be evaluated and treated early in the course of their disease to prevent any permanent ocular or periocular deformities. 相似文献
16.
17.
R Dixon AM Hughes K Nairn M Sellers JV Kemp RA Yates 《Cephalalgia : an international journal of headache》1998,18(7):468-475
Zolmitriptan (ZomigTM ) is a 5HT1B/1D agonist which has the ability to cross the intact blood-brain barrier to access central as well as peripheral receptors. Because of the potential for central nervous system side effects, this randomized, double-blind, placebo-controlled, 6-period crossover study evaluated the effects of 2.5 and 5 mg doses of zolmitriptan on psychomotor performance and investigated any pharmacodynamic or pharmacokinetic interaction with diazepam. Twelve healthy volunteers received the following "treatments" as single doses: zolmitriptan 2.5 mg, zolmitriptan 5 mg, diazepam 10 mg, zolmitriptan 2.5 mg+diazepam 10 mg, zolmitriptan 5 mg+diazepam 10 mg and placebo. Pre-dose and at 1, 4, 8, and 24 h post-dose, the following validated battery of psychomotor tests was performed: Bond-Lader visual analogue scales (calmness, contentedness, and alertness factors), critical flicker fusion test, choice reaction time (recognition, motor, and total reaction times), finger-tapping test, number cancellation test and digit symbol substitution test. Plasma concentrations of zolmitriptan, its active metabolite, and diazepam and its active metabolites were measured at the same timepoints. Zolmitriptan 2.5 and 5 mg had no effect on psychomotor function when given alone. In contrast, diazepam 10 mg had profound effects, consistent with its sedative properties, but there was no synergism on concomitant administration of either dose of zolmitriptan. Plasma concentrations of zolmitriptan, diazepam, and their respective active metabolites were similar when the two drugs were given alone or in combination. 相似文献
18.
A J Herruzo L Martínez E Biel R Robles M A Rosales J A Miranda 《International journal of gynaecology and obstetrics》1991,36(1):17-22
We reviewed 488 twin pregnancies that resulted in the birth of neonates weighing 1000 g or more. Complications were present in 56.7% of all pregnancies; most common were threat of premature labor (17.4%) and preeclampsia (14.5%). Perinatal mortality was 31.8 per thousand. Eighty percent of neonatal deaths in twin pregnancies involved newborns weighing less than 2000 g. Twin pregnancies are high risk pregnancies and benefit from early diagnosis, prevention and treatment of the threat of premature birth. 相似文献
19.
20.