全文获取类型
收费全文 | 83104篇 |
免费 | 7472篇 |
国内免费 | 4623篇 |
专业分类
耳鼻咽喉 | 714篇 |
儿科学 | 1178篇 |
妇产科学 | 869篇 |
基础医学 | 9219篇 |
口腔科学 | 2331篇 |
临床医学 | 9021篇 |
内科学 | 11529篇 |
皮肤病学 | 1258篇 |
神经病学 | 4621篇 |
特种医学 | 3665篇 |
外国民族医学 | 22篇 |
外科学 | 10587篇 |
综合类 | 14221篇 |
现状与发展 | 13篇 |
一般理论 | 16篇 |
预防医学 | 6308篇 |
眼科学 | 1612篇 |
药学 | 8275篇 |
53篇 | |
中国医学 | 3985篇 |
肿瘤学 | 5702篇 |
出版年
2024年 | 207篇 |
2023年 | 773篇 |
2022年 | 1841篇 |
2021年 | 2721篇 |
2020年 | 2198篇 |
2019年 | 1744篇 |
2018年 | 2173篇 |
2017年 | 2070篇 |
2016年 | 1818篇 |
2015年 | 2920篇 |
2014年 | 3877篇 |
2013年 | 4334篇 |
2012年 | 6103篇 |
2011年 | 6446篇 |
2010年 | 5001篇 |
2009年 | 4411篇 |
2008年 | 4959篇 |
2007年 | 4725篇 |
2006年 | 4534篇 |
2005年 | 3772篇 |
2004年 | 2827篇 |
2003年 | 2420篇 |
2002年 | 1968篇 |
2001年 | 3156篇 |
2000年 | 2933篇 |
1999年 | 2351篇 |
1998年 | 979篇 |
1997年 | 745篇 |
1996年 | 500篇 |
1995年 | 436篇 |
1994年 | 399篇 |
1993年 | 308篇 |
1992年 | 1068篇 |
1991年 | 951篇 |
1990年 | 835篇 |
1989年 | 915篇 |
1988年 | 830篇 |
1987年 | 760篇 |
1986年 | 711篇 |
1985年 | 613篇 |
1984年 | 388篇 |
1983年 | 320篇 |
1982年 | 183篇 |
1981年 | 140篇 |
1980年 | 119篇 |
1979年 | 204篇 |
1974年 | 84篇 |
1973年 | 97篇 |
1972年 | 95篇 |
1971年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
1992~1993年间为180例冠脉病变的病人施行冠脉搭桥术,全部病人均采用核甙抑制剂利多氟嗪预处理和低温(28℃)间断缺血心停搏进行术中心肌保护。平均每例病人作冠状动脉端吻合3~4个,每个吻合口用9分钟,主动脉阻断累加时间约25分钟,体外循环时间90分钟,术后医院死亡率1.6%(3/180),无术后心梗发生。作者认为,冠脉搭桥术的术中心肌保护可采用核甙抑制剂和间断缺血心停搏方法,而不用心肌停搏液。 相似文献
152.
利多氟嗪加强间断缺血心停搏心肌的保护作用 总被引:1,自引:1,他引:0
通过对16条犬常温下用利多氟嗪(lidoflazine)预处理加强间断主动脉阻断心停搏心肌保护作用的实验研究。16条犬随机分为对照组和实验组。结果发现,实验组心脏血流动力学的恢复要明显优于对照组。二组间心肌组织ATP、腺苷和肌苷以及冠脉回流液中CPK、CPK-MB、LDH、SOD和MDA值均有显著性差异(P>0.05)。作者认为,冠脉搭桥术中采用间断缺血心停搏时加用利多氟嗪有利于保存心肌能量,减轻心肌再灌注损伤和术后迅即恢复心脏功能。 相似文献
153.
154.
155.
156.
157.
158.
L Z Wu L H Zeng Q Y Ma Y J Xie Y Z Chen D Z Wu 《Japanese journal of ophthalmology》1988,32(2):236-245
The hereditary characteristics of enzyme deficiency and dermatoglyphics in congenital color blindness (CCB) were studied. We propose that there is a linkage between the two loci on the X-chromosome determining CCB and glucose-6-phosphate dehydrogenase (G6PD), based on our study of a high incidence of G6PD deficiency in 156 male cases with CCB. The CCB gene is closely linked with that of G6PD deficiency from our pedigree investigations. The rise in the frequency of eight or more whorls, the low value of atd angle and the presenting rate of real palmar patterns of the thenar, hypothenar and I, areas presented the hereditary traits of congenital color blindness. 相似文献
159.
Xiao Er Ke Chuan Ling Oral Liquid (KCL) is a Chinese herbal preparation consisted of 10 herbs such as Prunus armeniacae, Scutelaria baicalensis, Lonicera japonica etc. 30 children suffering from bronchopneumonia and/or acute bronchitis were treated with KCL (treated group) and another 30 cases were treated with penicillin and aminophylline (control group). Results: cure rate and effective rate in treated group was 26.6%, and 93.3% respectively. While in control group was 30% and 96.6% respectively. No significant differences were seen between them(P > 0.05). The pharmacodynamic experiment showed KCL had potent pharmacological action. The experiment on tracheal fragment of Guinea pig in vitro showed it caused moderately strong smooth muscle relaxation, through inhibition the effect of histamine and acetylcholine. Asthma induction experiment of Guinea pig in vivo showed KCL could significantly prolong the latent period of asthma and alleviate asthmatic symptom. Ammonium water cough induction experiment in mice showed it may apparently prolong cough latent period and reduce times of cough relapse and alleviate cough symptom. KCL had potent antipyretic effect on fever model induced by triple vaccine in rabbits. Bacteriostatic and antiviral experiment in vitro showed the drug had quite strong inhibitory effects for Streptococcus hemolyticus, Staphylococcus aureus, Flexners Dysentery bacillus, Diplococcus pneumoniae and Pseudomonas aeruginosa, and it could potently inhibit the respiratory syncytial virus. KCL is an effective drug in treating bronchopneumonia and acute bronchitis. 相似文献
160.
Viral markers were studied in 79 cases of viral hepatitis with hepatic failure. The results were shown as follows: 8 cases were positive for anti-HAV IgM (10.12%); 76 cases positive for HBsAg or anti-HBc IgM (96.20%) and 41 cases positive for anti-HCV antibodies (51.89%). Among those with anti-HCV positive, 35 cases were co-infected with HBV, 5 cases with HAV and/or HCV, only one was infected with HCV alone 2 cases were HD-Ag positive (2.52%) and one not identified (1.27%). With the reference of clinical findings, patients co-infected with HBV/HCV or anti-HBc IgM positive were more critical and usually entail higher mortality. In cases with HCV co-infections, the positive HBV replication markers seems to be reduced. Hepatic failure without HBV replicative markers had a high rate of hepatic coma as well as poor outcome. 相似文献