全文获取类型
收费全文 | 392篇 |
免费 | 73篇 |
国内免费 | 97篇 |
出版年
2024年 | 4篇 |
2023年 | 12篇 |
2022年 | 20篇 |
2021年 | 21篇 |
2020年 | 24篇 |
2019年 | 16篇 |
2018年 | 20篇 |
2017年 | 23篇 |
2016年 | 16篇 |
2015年 | 19篇 |
2014年 | 28篇 |
2013年 | 37篇 |
2012年 | 45篇 |
2011年 | 37篇 |
2010年 | 24篇 |
2009年 | 27篇 |
2008年 | 34篇 |
2007年 | 34篇 |
2006年 | 33篇 |
2005年 | 17篇 |
2004年 | 16篇 |
2003年 | 15篇 |
2002年 | 10篇 |
2001年 | 5篇 |
2000年 | 8篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1992年 | 1篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1985年 | 2篇 |
排序方式: 共有562条查询结果,搜索用时 0 毫秒
361.
为了探讨在手汗症手术中一次性喉罩替代气管内插管的安全性和可行性.择期行胸腔交感神经链切断术的患者40例,分为气管导管组(T组)和喉罩组(L组).结果L组与T组相比,T2、T8各时点的SBP、DBP降低,HR减慢(P<0.05).两组患者术中及术后SpO2均维持98%以上,通气参数及血气分析结果均在正常范围内.喉罩通气麻醉操作简便,通气可靠,且对心血管系统刺激小. 相似文献
362.
In the present study, we tested a theoretically and empirically derived partially indirect effects acculturation and enculturation model of Asian American college students' mental health and attitudes toward seeking professional psychological help. Latent variable path analysis with 296 self-identified Asian American college students supported the partially indirect effects model and demonstrated the ways in which behavioral acculturation, behavioral enculturation, values acculturation, values enculturation, and acculturation gap family conflict related to mental health and attitudes toward seeking professional psychological help directly and indirectly through acculturative stress. We also tested a generational status moderator hypothesis to determine whether differences in model-implied relationships emerged across U.S.- (n = 185) and foreign-born (n = 107) participants. Consistent with this hypothesis, statistically significant differences in structural coefficients emerged across generational status. Limitations, future directions for research, and counseling implications are discussed. 相似文献
363.
Three experiments examined the role of reference directions in spatial updating. Participants briefly viewed an array of five objects. A non-egocentric reference direction was primed by placing a stick under two objects in the array at the time of learning. After a short interval, participants detected which object had been moved at a novel view that was caused by table rotation or by their own locomotion. The stick was removed at test. The results showed that detection of position change was better when an object not on the stick was moved than when an object on the stick was moved. Furthermore change detection was better in the observer locomotion condition than in the table rotation condition only when an object on the stick was moved but not when an object not on the stick was moved. These results indicated that when the reference direction was not accurately indicated in the test scene, detection of position change was impaired but this impairment was less in the observer locomotion condition. These results suggest that people not only represent objects’ locations with respect to a fixed reference direction but also represent and update their orientation according to the same reference direction, which can be used to recover the accurate reference direction and facilitate detection of position change when no accurate reference direction is presented in the test scene. 相似文献
364.
精神病态传统上一般被定义为一种人格(尤其是情感缺乏)的障碍,其次在小范围内才是行为障碍。尽管经常被相互混用,但是在诊断思路上,精神病态与反社会型人格障碍还是有区别的。二者不能简单等同起来,需明辨二者的关系。 相似文献
365.
马克思主义中国化的学术意义 总被引:1,自引:0,他引:1
Raising the questions of how to construct the contemporary system of the Chinese academic discourse and of its background means that the yardsticks of its academic measure should be reappraised. All the important theoretical ideas come from theorists'innovative reactions in their responses to the theoretical and realistic challenges. The right perspective of their observation should start from social sources in which ideas rise,and thereby critical opinions are extracted against the existing theory. In the ... 相似文献
366.
为了探讨重症免疫性血小板减少性紫癜(ITP)的治疗方案,回顾性分析118例接受激素(92例)或丙种球蛋白(16例)或rhTPO(10例)治疗患者的临床资料,分析疗效及不良反应。结果显示:(1)激素组、丙种球蛋白组和rhTPO组总有效率分别为76.1%、81.3%和70%,组间差异无统计学意义。复发组有效率(67.3%)明显低于初治组(83.3%,P0.05),PAIgG伴PAIgM升高组有效率明显低于不伴PAIgM升高组(P0.05);(2)血小板达峰时间:激素组为(5.70±3.68)d,丙种球蛋白组为(4.31±0.75)d,rhTPO组为(5.00±1.63)d,激素组与丙种球蛋白组间差异有统计学意义(P0.05);(3)不良反应:激素组均出现类库欣综合征表现,丙种球蛋白组未见不良反应,1例(10%)rhTPO组患者出现轻度转氨酶增高。总之,丙种球蛋白和rhTPO治疗成人重症ITP疗效好,不良反应轻微。 相似文献
367.
死亡教育既是医学教育应有的内容,同时又是通向其终级目标的一个有效途径,"向死而生"则是死亡教育的核心价值理念.开展死亡教育,能够帮助大学生正确认识死亡,使其自觉地对自我生存境遇进行体察,克服对死亡的恐惧和焦虑,省思生命,明晰生命的真谛,进而超越死亡,展现人性光辉,活出人生意义,这也是死亡教育意义的价值指向. 相似文献
368.
急性肺损伤生物标志物研究进展 总被引:2,自引:1,他引:1
急性肺损伤是临床常见的呼吸系统急危重症,是多个危险因素直接或间接引起肺部损伤的连续病理过程,低氧血症为其特征,其发病机制复杂,病亡率高,目前临床上仍缺乏有效的早期诊断方法,严重影响了疾病的预后,因此需寻找一个简单有效的诊断方法,如血清生物标志物的测定等来帮助本病的诊断以取得更好的疗效。 相似文献
369.
Sénéchal's research in the West with English- and French-speaking children included positive relations of the development of literacy skills with home literacy experiences. There is a need to extend this research to other countries, especially in China where few studies have been done. This study examined relations of parental reports of formal and informal home literacy variables with Chinese children's vocabulary and written language development. Consistent with previous studies in the West, informal home literacy experiences were associated with Chinese children's vocabulary knowledge, and formal literacy experiences with reading skills. These findings fit previous research which distinguishes formal and informal literacy experiences in relation to children's performance on reading and language skills, and indicates reading to children is less effective for acquisition of print-specific skills. 相似文献
370.
宋代学者在哲学层面重新阐发了礼的历史根源和价值根基。首先,礼是为满足人的生存和发展的需要而产生的,心性本体是礼的内在根源,礼是心性本体的外在形式。其次,礼的内涵有着三个层面:天理本体,天理的表现形式,人类社会全部规范的总合。 相似文献