全文获取类型
收费全文 | 4021044篇 |
免费 | 284970篇 |
国内免费 | 9070篇 |
专业分类
耳鼻咽喉 | 55877篇 |
儿科学 | 131710篇 |
妇产科学 | 110652篇 |
基础医学 | 573659篇 |
口腔科学 | 112110篇 |
临床医学 | 370227篇 |
内科学 | 775890篇 |
皮肤病学 | 92951篇 |
神经病学 | 325862篇 |
特种医学 | 152112篇 |
外国民族医学 | 1141篇 |
外科学 | 600769篇 |
综合类 | 83658篇 |
现状与发展 | 15篇 |
一般理论 | 1603篇 |
预防医学 | 314768篇 |
眼科学 | 93673篇 |
药学 | 296244篇 |
16篇 | |
中国医学 | 7862篇 |
肿瘤学 | 214285篇 |
出版年
2019年 | 32320篇 |
2018年 | 44670篇 |
2017年 | 33852篇 |
2016年 | 38933篇 |
2015年 | 43830篇 |
2014年 | 61210篇 |
2013年 | 92725篇 |
2012年 | 124927篇 |
2011年 | 132674篇 |
2010年 | 79799篇 |
2009年 | 75883篇 |
2008年 | 124165篇 |
2007年 | 132022篇 |
2006年 | 133956篇 |
2005年 | 129246篇 |
2004年 | 124371篇 |
2003年 | 119877篇 |
2002年 | 115935篇 |
2001年 | 183137篇 |
2000年 | 187986篇 |
1999年 | 158940篇 |
1998年 | 47206篇 |
1997年 | 41483篇 |
1996年 | 41633篇 |
1995年 | 40017篇 |
1994年 | 36759篇 |
1993年 | 34579篇 |
1992年 | 124645篇 |
1991年 | 120826篇 |
1990年 | 117519篇 |
1989年 | 113907篇 |
1988年 | 104828篇 |
1987年 | 102729篇 |
1986年 | 96721篇 |
1985年 | 92701篇 |
1984年 | 69305篇 |
1983年 | 59007篇 |
1982年 | 35178篇 |
1981年 | 31679篇 |
1979年 | 62890篇 |
1978年 | 44722篇 |
1977年 | 37765篇 |
1976年 | 35545篇 |
1975年 | 37968篇 |
1974年 | 45284篇 |
1973年 | 43148篇 |
1972年 | 40612篇 |
1971年 | 38142篇 |
1970年 | 35120篇 |
1969年 | 33800篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
951.
952.
953.
Alcoholic liver disease: an IgA-associated disorder 总被引:1,自引:0,他引:1
954.
The rationale for operations on the saccus and vestibular nerve in patients incapacitated by Meniere's disease as a replacement for total labyrinthectomy, has been the expectancy that less radical procedures will protect these patients from total auditory incapacity. Aware of postoperative hearing losses in some patients after 3 years, we have studied the results in 21 Shambaugh saccus decompression (SD) and 29 middle fossa vestibular nerve section (VNS) operations, in order to assess the claims made for these procedures. We found that while control of vertigo was similar to that reported elsewhere, worse hearing (AAOO criteria) developed in many cases. With SD this increased from 14% at 1 year to 58% at 10 years, and with VNS it increased from 17% at 1 year to 48% at 10 years, when the worse preoperative audiogram was used. Only 17% of SD and 11% VNS ears with serviceable best preoperative hearing had retained this at 10 years. Nineteen percent developed audiometric evidence of contralateral disease during the first 10 postoperative years. It is concluded that although, regrettably, neither of these surgical therapies appears to have the capability of preventing the progress of hearing loss, the reality of bilateral disease justifies the continued use of SD or VNS by adequately trained surgeons. 相似文献
955.
956.
957.
958.
Norfloxacin, a new quinolinecarboxylic acid derivative, was administered to 30 male patients with gonococcal urethritis at a daily dose of 600 mg for 7-21 days. The clinical response was evaluated after administration of 7 days as excellent; Negative culture of N. gonorrhoeae. WBC less than 3/hpf in first voided urine sediment, good; Negative culture, WBC greater than or equal to 3/hpf, and poor; Positive culture. The result was excellent in 14 cases and good in 16 cases. No subjective side effects were observed. The minimum inhibitory concentration (MIC) distribution against the clinically isolated 30 strains of N. gonorrhoeae ranged from 0.0096 micrograms/ml to 0.34 micrograms/ml. Seven of thirty strains were resistant to ABPC. The MIC of these 7 strains ranged from 0.018 micrograms/ml to 0.18 micrograms/ml. Seven cases with ABPC resistant strains had a similar clinical response to other cases. Twelve patients (40%) developed post gonococcal urethritis for 7-14 days after treatment. Clinical observation of this series suggests that a 7 day therapy of Norfloxacin for the patients with gonococcal urethritis is sufficiently effective and that treatment should be changed to other antibacterial agents in the case of post gonococcal urethritis, since continuous administration for more than 7 days of Norfloxacin is not so effective. 相似文献
959.
Cocaine-treated rats acquired a preference for cocaine-associated contextual stimuli (CS) relative to saline-injected control rats. However, when animals were given repeated tests for conditioned place preference intermittent between conditioning trials, they displayed an attenuation in strength of conditioning. This attenuation was not due to pharmacologic tolerance (Experiment 1), but rather reflected a disruption in learning due to exposure to the CS alone (Experiment 2). Like other examples of classical conditioning, the strength of the conditioned response (CR) as assessed by the conditioned place preference model may be influenced by partial reinforcement. 相似文献
960.
This study investigated social interactions between infants and mothers, comparing dyads with physically disabled infants and dyads with nondisabled infants. The groups were matched on mental and motor development, sex, socioeconomic status, birth order, and maternal education. Each infant-mother dyad was videotaped at home during a 10-minute period of free play, and blind observers subsequently transcribed infants' and mothers' behaviors. In general, the groups were remarkably similar in their interaction patterns. However, a few differences emerged: Mothers of infants with physical disabilities were significantly more commanding than were comparison mothers. Nondisabled infants tended to engage in more eye contact than did infants with physical disabilities. And whereas mothers of nondisabled infants responded to interactive play with interactive play, mothers of infants with physical handicaps tended to respond with commands and verbalizations. These results suggest reciprocal influences between infants and mothers in both groups and highlight emerging maternal behavior patterns that may interfere with the development of communication and independence in handicapped young children. 相似文献