全文获取类型
收费全文 | 56594篇 |
免费 | 8272篇 |
国内免费 | 473篇 |
专业分类
耳鼻咽喉 | 999篇 |
儿科学 | 1577篇 |
妇产科学 | 1645篇 |
基础医学 | 4837篇 |
口腔科学 | 3213篇 |
临床医学 | 7818篇 |
内科学 | 12592篇 |
皮肤病学 | 1281篇 |
神经病学 | 4192篇 |
特种医学 | 2133篇 |
外科学 | 8562篇 |
综合类 | 1226篇 |
现状与发展 | 12篇 |
一般理论 | 32篇 |
预防医学 | 4629篇 |
眼科学 | 1897篇 |
药学 | 2889篇 |
中国医学 | 313篇 |
肿瘤学 | 5492篇 |
出版年
2024年 | 192篇 |
2023年 | 1341篇 |
2022年 | 860篇 |
2021年 | 1575篇 |
2020年 | 1816篇 |
2019年 | 1252篇 |
2018年 | 2298篇 |
2017年 | 2031篇 |
2016年 | 2344篇 |
2015年 | 2573篇 |
2014年 | 3298篇 |
2013年 | 3969篇 |
2012年 | 3078篇 |
2011年 | 3154篇 |
2010年 | 2733篇 |
2009年 | 3154篇 |
2008年 | 2630篇 |
2007年 | 2462篇 |
2006年 | 2614篇 |
2005年 | 2357篇 |
2004年 | 2003篇 |
2003年 | 1858篇 |
2002年 | 1654篇 |
2001年 | 1494篇 |
2000年 | 1320篇 |
1999年 | 1276篇 |
1998年 | 852篇 |
1997年 | 739篇 |
1996年 | 772篇 |
1995年 | 579篇 |
1994年 | 486篇 |
1993年 | 446篇 |
1992年 | 624篇 |
1991年 | 591篇 |
1990年 | 554篇 |
1989年 | 534篇 |
1988年 | 468篇 |
1987年 | 487篇 |
1986年 | 418篇 |
1985年 | 364篇 |
1984年 | 278篇 |
1983年 | 235篇 |
1982年 | 176篇 |
1981年 | 152篇 |
1980年 | 134篇 |
1979年 | 170篇 |
1978年 | 121篇 |
1977年 | 115篇 |
1976年 | 107篇 |
1975年 | 104篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
72.
73.
Mao-Sheng Ran Meng-Ze Xiang Jie Li Jian Huang Eric Yu-Hai Chen Cecilia Lai-Wan Chan Yeates Conwell 《Archives of Suicide Research》2007,11(1):119-127
The aim of this study was to compare the demographic and clinical characteristics of individuals with affective disorders who had attempted suicide at some time in their lives and those who had not made a suicide attempt. In a Chinese rural community, individuals with suicide attempt (N = 30) and those without suicide attempt (N = 166) were assessed with Present State Examination (PSE). Attempters had a significantly higher level of family economic status, higher rate of lifetime depressed mood and hopelessness, and delusions than nonattempters. The logistic regression models also indicated that depressed mood and hopelessness were the most important predictors of suicide attempts. No significant difference in treatment condition was found between attempters and non-attempters. Early identification and interventions focusing on reducing depressed mood, hopelessness, and controlling psychotic symptoms may be helpful in reducing the risk of suicide attempts among individuals with affective disorders residing in the community. 相似文献
74.
75.
76.
Klippel-Feil syndrome (KFS) is a heterogeneous entity, characterized by specific congenital anomalies of segmentation of the cervical spine. We report a case of KFS plus atretic meningocele in one identical twin and anencephaly in the other. These identical twins were both male with no chromosome defect. One of them had anencephaly diagnosed at the gestational age of 17 weeks and died soon after birth, whereas the co-twin had KFS with multiple congenital anomalies including short neck with low hairline, occipital atretic meningocele, butterfly vertebrae, hemivertebrae, cervico-thoracic scoliosis, left thumb preaxial polydactyly, and right undescended testis. He received rehabilitation during infancy and could walk at the age of 15 months. Both of these infants had preaxial polydactyly, which is an uncommon anomaly associated with KFS. In conclusion, iniencephaly and anencephaly are probably the extreme manifestations of KFS rather than different dysraphisms. Prompt clinical suspicion with early diagnostic imaging for spine lesions and occult opening of neural tube is mandatory for further intervention and rehabilitation. 相似文献
77.
78.
79.
Susan W. Volk VMD PhD ; Antoneta Radu BS ; Liping Zhang MS ; Kenneth W. Liechty MD 《Wound repair and regeneration》2007,15(5):736-747
Chronic wounds create a formidable clinical problem resulting in considerable morbidity and healthcare expenditure. The etiology for wound healing impairment appears to be multifactorial; however, ischemia is a common factor in most types of chronic wounds. Ideal therapy for such wounds would be to correct deficiencies in growth factors and matrix components and provide cellular precursors required for timely wound closure. We hypothesized that stromal progenitor cell (SPC) therapy could correct the ischemic wound-healing defect through both direct and indirect mechanisms. To test this hypothesis, we used the ischemic rabbit ear model of chronic wound healing. We found that treatment of the wounds with SPCs was able to reverse the ischemic wound-healing impairment, with improved granulation tissue formation and reepithelialization compared with vehicle or bone marrow mononuclear cell controls. In vitro, SPCs were found to produce factors involved in angiogenesis and reepithelialization, and extracellular matrix components, providing evidence for both direct and indirect mechanisms for the observed correction of the healing impairment in these wounds. Treatment of ischemic wounds with SPCs can dramatically improve wound healing and provides a rationale for further studies focused on SPCs as a potential cellular therapy in impaired wound healing. 相似文献
80.
Burness Gene Wenberg MS RD December 《Journal of the American Dietetic Association》2004,104(8):1297-1299