全文获取类型
收费全文 | 4216篇 |
免费 | 294篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 39篇 |
儿科学 | 76篇 |
妇产科学 | 117篇 |
基础医学 | 724篇 |
口腔科学 | 53篇 |
临床医学 | 407篇 |
内科学 | 1072篇 |
皮肤病学 | 62篇 |
神经病学 | 309篇 |
特种医学 | 170篇 |
外科学 | 370篇 |
综合类 | 94篇 |
预防医学 | 149篇 |
眼科学 | 67篇 |
药学 | 483篇 |
中国医学 | 19篇 |
肿瘤学 | 324篇 |
出版年
2023年 | 15篇 |
2022年 | 35篇 |
2021年 | 61篇 |
2020年 | 38篇 |
2019年 | 41篇 |
2018年 | 57篇 |
2017年 | 50篇 |
2016年 | 74篇 |
2015年 | 80篇 |
2014年 | 118篇 |
2013年 | 143篇 |
2012年 | 265篇 |
2011年 | 265篇 |
2010年 | 148篇 |
2009年 | 133篇 |
2008年 | 275篇 |
2007年 | 271篇 |
2006年 | 308篇 |
2005年 | 292篇 |
2004年 | 269篇 |
2003年 | 257篇 |
2002年 | 264篇 |
2001年 | 71篇 |
2000年 | 73篇 |
1999年 | 86篇 |
1998年 | 70篇 |
1997年 | 50篇 |
1996年 | 41篇 |
1995年 | 39篇 |
1994年 | 29篇 |
1993年 | 41篇 |
1992年 | 33篇 |
1991年 | 33篇 |
1990年 | 27篇 |
1989年 | 35篇 |
1988年 | 39篇 |
1987年 | 39篇 |
1986年 | 31篇 |
1985年 | 23篇 |
1984年 | 16篇 |
1983年 | 35篇 |
1982年 | 30篇 |
1981年 | 15篇 |
1980年 | 20篇 |
1979年 | 14篇 |
1976年 | 13篇 |
1975年 | 22篇 |
1974年 | 14篇 |
1973年 | 14篇 |
1970年 | 13篇 |
排序方式: 共有4535条查询结果,搜索用时 15 毫秒
1.
2.
Age determines memory for face identity and expression 总被引:1,自引:1,他引:0
Egemen SAVASKAN Sandra Elisabeth MÜLLER reas BÖHRINGER Christine PHILIPPSEN Franz MÜLLER-SPAHN Hartmut SCHÄCHINGER 《Psychogeriatrics》2007,7(2):49-57
Background: The recognition of facial expressions is an important component of emotion processing which contributes to interactional behavior. One of the factors highly associated with potential decline of ability in behavioral tasks is age. Methods: We have investigated age‐related changes in facial identity and expression memory of healthy subjects in three age groups: young adults (20–40 years), elderly adults (60–80 years) and, for the first time in the literature, very old adults (over 80 years of age). Using a picture test, photographs of faces with happy or angry expressions were presented to study participants during the encoding task, and the memory for identity and emotional facial expression was investigated in a subsequent recognition task showing emotionally neutral faces. Half of the faces presented in the recognition task were initially shown in the encoding task. Results: Age interacted with the memory process: the ability to recognize both facial identity and emotional expression declined with advanced age. Happy facial expressions were better recognized in all age groups. Although there was a continuous overall decrease in recognition of both happy and angry expressions with advanced age, the effect favoring happy facial expressions was stable also in very old adults. Other factors such as gender or educational level did not affect the memory process for facial expressions. Conclusions: Our findings suggest that age is a significant determinant of memory for facial identity and emotional expression, and that, similar to younger adults, the recognition process of the elderly favors happy emotional facial expressions. 相似文献
3.
4.
Minoo Lenarz Martin Durisin Hartmut Becker Almuth Brandis Thomas Lenarz 《Skull base》2007,17(2):153-156
We report a case of synchronous olfactory bulb meningioma and undifferentiated carcinoma of the nose and paranasal sinuses that involved and destroyed the anterior skull base and mimicked intracranial invasion by a carcinoma. The heterogeneity of tissue types in the skull base gives rise to a diverse variety of benign and malignant neoplasms which have totally different prognoses. Synchronous development of benign and malignant primary tumors both originating from and involving the skull base at the same location is very rare and may cause confusion for both the skull base surgeon and neuroradiologist. 相似文献
5.
6.
7.
股骨干骨折--逆行穿钉与顺行穿钉的探讨 总被引:1,自引:0,他引:1
在对股骨骨折进行逆行和顺行置入髓内钉治疗时,两种治疗方法产生很高的愈合率和相近的畸形愈合率。虽然未经过一致的认定,但那些接受顺行穿钉治疗的患者愈合较快。患者在接受逆行穿钉治疗后膝关节疼痛频繁出现,然而髋关节疼痛和异位骨化现象却在接受顺行穿钉治疗的患者中存在。患其它并发症的几率也无显著增长。因此不能决定功能结果。 相似文献
8.
Christoph R?cken Jutta Ernst Ernst Hund Hartmut Michels Jolanta Perz Wolfgang Saeger Orhan Sezer Simone Spuler Friedrich Willig und Hartmut H.-J. Schmidt 《Medizinische Klinik》2006,101(10):825-829
Ohne Zusammenfassung 相似文献
9.
10.