全文获取类型
收费全文 | 18414篇 |
免费 | 1187篇 |
国内免费 | 233篇 |
专业分类
耳鼻咽喉 | 246篇 |
儿科学 | 301篇 |
妇产科学 | 279篇 |
基础医学 | 1791篇 |
口腔科学 | 540篇 |
临床医学 | 2683篇 |
内科学 | 1385篇 |
皮肤病学 | 150篇 |
神经病学 | 3107篇 |
特种医学 | 419篇 |
外科学 | 856篇 |
综合类 | 2398篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 2306篇 |
眼科学 | 82篇 |
药学 | 2376篇 |
30篇 | |
中国医学 | 562篇 |
肿瘤学 | 321篇 |
出版年
2024年 | 26篇 |
2023年 | 295篇 |
2022年 | 545篇 |
2021年 | 867篇 |
2020年 | 801篇 |
2019年 | 570篇 |
2018年 | 561篇 |
2017年 | 658篇 |
2016年 | 713篇 |
2015年 | 629篇 |
2014年 | 1354篇 |
2013年 | 1442篇 |
2012年 | 1271篇 |
2011年 | 1451篇 |
2010年 | 1059篇 |
2009年 | 1017篇 |
2008年 | 979篇 |
2007年 | 837篇 |
2006年 | 667篇 |
2005年 | 561篇 |
2004年 | 441篇 |
2003年 | 414篇 |
2002年 | 291篇 |
2001年 | 274篇 |
2000年 | 190篇 |
1999年 | 174篇 |
1998年 | 170篇 |
1997年 | 150篇 |
1996年 | 122篇 |
1995年 | 103篇 |
1994年 | 99篇 |
1993年 | 83篇 |
1992年 | 91篇 |
1991年 | 77篇 |
1990年 | 75篇 |
1989年 | 75篇 |
1988年 | 68篇 |
1987年 | 69篇 |
1986年 | 54篇 |
1985年 | 86篇 |
1984年 | 68篇 |
1983年 | 36篇 |
1982年 | 57篇 |
1981年 | 42篇 |
1980年 | 31篇 |
1979年 | 41篇 |
1978年 | 26篇 |
1977年 | 23篇 |
1975年 | 14篇 |
1974年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
"立交桥"高职护理人才培养模式初探 总被引:3,自引:1,他引:2
为探讨中等卫生学校毕业就读高等护理专业学生(即“立交桥”高职)的培养模式,在坚持高等教育培养目标及职业特色的前提下,结合学生特点,进行课程设置、教学方法及临床实践等方面的改革,以发挥学生的优势,弥补学生的不足,培养适应现代护理发展需要的高质量护理人才。 相似文献
32.
D. Caroline Blanchard Jon K. Shepherd Antonio De Padua Carobrez Robert J. Blanchard 《Neuroscience and biobehavioral reviews》1991,15(4):461-468
Female rats consistently show a pattern of differences in defensive behaviors compared to males which parallel the effects of exposure to a nonpainful threat stimulus (cat or cat odor) in the same tests and measures. These indications of greater defensiveness for females are particularly common in situations involving potential, as opposed to actual and present, threat, a factor which probably also reflects ceiling or floor effects in situations involving very intense defensiveness. In addition, pharmacological studies indicate sex differences in the effects of selective serotonin (5-HT) receptor agonists and antagonists on defensive responding. These findings indicate that sex effects must be considered in studies of the pharmacological control of defensive behaviors, and suggest that responsivity to sex effects may be an additional criterion for the suitability of animal models of anxiety. 相似文献
33.
Cristina Benatti Silvia Alboni Giacomo Capone Daniela Corsini Federica Caggia Nicoletta Brunello Fabio Tascedda Joan M.C. Blom 《International journal of developmental neuroscience》2009,27(7):661-668
Protracted or recurrent pain and inflammation in the early neonatal period may cause long-lasting changes in central neural function. However, more research is necessary to better characterize the long-term behavioral sequelae of such exposure in the neonatal period. Objectives: (1) to study whether timing of postnatal exposure to persistent inflammation alters responsiveness to thermal pain in the adult animal; (2) to assess whether animals experiencing early postnatal chronic inflammation display altered anxiety related behavior; (3) to study the importance of genetic background. Newborn mice (outbred strain, CD1 and F1 hybrid strain, B6C3F1) received an injection of Complete Freund's Adjuvant (CFA) or saline on either postnatal day 1 or 14 (PND1; PND14) into the left hind paw. Pain to radiant heat and anxiety were examined in 12-week-old adult animals. Adult baseline PWL was significantly decreased in CD1 mice exposed to CFA on PND 1 and 14 as compared to their saline treated counterparts. B6C3F1 mice exposed to CFA on PND14 showed markedly reduced baseline PWL compared to the PND14 saline group. Persistent inflammation experienced by B6C3F1 mice on PND1 failed to affect baseline adult thermal responsiveness. Adult mice, CD1 and B6C3F1, displayed low anxiety traits only if they had been exposed to persistent inflammation on PND1 and not on PND14. Our research suggests a role for genetic background in modulating long-term behavioral consequences of neonatal persistent inflammation: the data support the hypothesis that pain experienced very early in life differentially affects adult behavioral and emotional responsiveness in outbred (CD1) and hybrid mice (B6C3F1). 相似文献
34.
35.
心血管疾病并发焦虑抑郁症状2050例心理干预治疗分析 总被引:13,自引:1,他引:12
目的:了解心血管疾病并发焦虑抑郁症状的情况并探讨心理干预等对焦虑抑郁症状的影响。方法:对住院的2050例心血管疾病并发焦虑抑郁症状的患者进行回顾性分析。结果:心血管疾病患者中并发有焦虑抑郁症状者占56%;其常表现为类似心绞痛、左心衰竭症状,可并发有心律失常;高血压病并发有焦虑抑郁患者对血压升高的耐受性差,动态血压检查以非勺型改变者居多;单纯使用心血管药物治疗效果欠佳,心理干预,焦虑抑郁症状严重者结合抗焦虑抑郁药物疗效显著。结论:心血管疾病患者常并发焦虑抑郁症状,心理干预治疗等可有效改善患者的症状。 相似文献
36.
上海地区汉族优秀游泳运动员ACE基因I/D多态性研究 总被引:4,自引:0,他引:4
目的:探讨上海地区汉族不同水平优秀游泳运动员ACE(血管紧张素转化酶)基因I/D多态性的分布特点。方法:采用PCR方法,对上海地区85名汉族优秀游泳运动员和90名汉族普通人的ACE基因I/D多态性进行检测。结果显示,上海地区汉族优秀游泳运动员的ACE基因的基因型和等位基因频率与上海和成都地区汉族普通人无明显差异(P>0.05);上海地区汉族游泳运动员和普通人以及成都地区汉族普通人的基因型和等位基因频率均与高加索人群存在高度显著性差异(P<0.0001),表现出明显的种族差异性。7名上海地区汉族国际健将ACE基因均为II型,运动水平越高的组别,II基因型和I等位基因频率越高,提示具有II基因型或I等位基因频率高的运动员经过多年运动训练,具有成为优秀运动员的可能,特别是II基因型的运动员可能性更大。 相似文献
37.
目的 了解精神病人和正常人戒烟前后精神状况的变化及差异性 ,探讨戒烟措施。方法 对 71例精神病人和 5 0例正常人戒烟前及戒烟后 1周分别应用汉密顿焦虑量表 (HAMA)、汉密顿抑郁量表 (HAMD)、焦虑自评量表 (SAS)、抑郁自评量表 (SDS)、简明精神病量表 (BPRS )进行测评。结果 精神病人强制性戒烟前HAMA、HAMD、SAS、SDS、BPRS分值分别为 (8.2 1± 6 .4 1)、(7.6 4± 5 .71)、(36 .81± 7.14 )、(33.71± 7.1)、(2 9.4 5± 8.4 7) ;戒烟后HAMA、HAMD、SAS、SDS、BPRS分值分别为 (16 .4 5± 6 .34)、(19.73± 8.71)、(5 8.1± 12 .12 )、(5 6 .31± 11.4 )、(37.32± 7.95 ) ;戒烟前后 5种量表分值变化与正常人戒烟前后分值变化比较有极显著性差异(P <0 .0 1)。结论 对精神病人强制性戒烟可引起明显的情绪反应 ,应适宜控制病人吸烟 ,建立一个合理的管理制度 相似文献
38.
依据乡村医生人力结构现状调查结果,就现阶段县级卫校在初级卫生保健中的作用及今后面向乡村医生办学的可行性作了具体的分析和探讨。结论是:提高质量,加强对在岗乡医进行系统化正规中专层次的职后复训,应是县级卫校今后1O年的最主要的任务。 相似文献
39.
Jim-Shoung Lai T.-N. Wu Saou-Hsing Liou Chen-Yang Shen Chiam-Fang Guu Kquei-Nu Ko Chi. Hsueh-Yun P.-Y. Chang 《International archives of occupational and environmental health》1997,69(4):295-300
Objective: To examine the relationship between ambient lead levels and blood lead levels and to explore the modifiers of the relationship
between ambient lead and blood lead. Method: A cross-sectional study was conducted in two lead battery factories. Blood lead level and ambient lead concentration were
measured for each participant concurrently. A structured questionnaire was administered to collect sociodemographic characteristics
and occupational history. Design: Biological and personal environmental measurements of 219 lead-exposed workers were analyzed by both simple and multiple linear
regression. A regression model was selected for interpretation. Results: A high correlation (r=0.62) between ambient lead (PbA) and blood lead (PbB) was observed. In addition, numerous factors, including age, sex, alcohol
consumption, personal hygiene practice and type of lead exposure, were also found to influence blood lead levels. Although
PbB was highly correlated with PbA, blood lead level may not be effectively lowered by reducing ambient lead level. Based
on the regression coefficients, improvement of hygienic practice was more effective at lowering PbB than reducing ambient
lead level. Good hygienic practice may be the preferential way to reduce lead exposure in current conditions. Conclusion: Education of correct work practice may be more important than engineering control in the developing countries to lower blood
lead levels in lead battery factories.
Received: 28 May 1996/Accepted: 30 August 1996 相似文献
40.