全文获取类型
收费全文 | 2677篇 |
免费 | 266篇 |
国内免费 | 54篇 |
专业分类
耳鼻咽喉 | 32篇 |
儿科学 | 63篇 |
妇产科学 | 47篇 |
基础医学 | 466篇 |
口腔科学 | 51篇 |
临床医学 | 293篇 |
内科学 | 437篇 |
皮肤病学 | 60篇 |
神经病学 | 219篇 |
特种医学 | 78篇 |
外科学 | 303篇 |
综合类 | 182篇 |
一般理论 | 1篇 |
预防医学 | 236篇 |
眼科学 | 72篇 |
药学 | 261篇 |
1篇 | |
中国医学 | 31篇 |
肿瘤学 | 164篇 |
出版年
2023年 | 33篇 |
2022年 | 44篇 |
2021年 | 74篇 |
2020年 | 48篇 |
2019年 | 76篇 |
2018年 | 125篇 |
2017年 | 88篇 |
2016年 | 141篇 |
2015年 | 119篇 |
2014年 | 164篇 |
2013年 | 247篇 |
2012年 | 162篇 |
2011年 | 147篇 |
2010年 | 167篇 |
2009年 | 91篇 |
2008年 | 92篇 |
2007年 | 90篇 |
2006年 | 103篇 |
2005年 | 57篇 |
2004年 | 54篇 |
2003年 | 55篇 |
2002年 | 56篇 |
2001年 | 61篇 |
2000年 | 62篇 |
1999年 | 41篇 |
1998年 | 42篇 |
1997年 | 26篇 |
1996年 | 27篇 |
1995年 | 22篇 |
1994年 | 15篇 |
1993年 | 18篇 |
1992年 | 17篇 |
1991年 | 14篇 |
1990年 | 20篇 |
1989年 | 21篇 |
1987年 | 11篇 |
1986年 | 20篇 |
1984年 | 18篇 |
1983年 | 12篇 |
1982年 | 13篇 |
1981年 | 18篇 |
1980年 | 12篇 |
1979年 | 17篇 |
1977年 | 13篇 |
1976年 | 15篇 |
1975年 | 13篇 |
1974年 | 12篇 |
1973年 | 10篇 |
1967年 | 13篇 |
1965年 | 13篇 |
排序方式: 共有2997条查询结果,搜索用时 15 毫秒
1.
ABSTRACTAlthough communication about sexuality is a significant pathway through which peers influence adolescent sexual development, little research has examined the role of peer networks in the use of sexualized media. We applied a social network approach to assess the role of close peers in adolescent pornography use and sexting in a sample of Croatian high school students. Sexual conversation networks’ characteristics did not correlate with pornography use. In contrast, sexting was associated with the proportion of same gender peers, the proportion of older peers and the proportion of sexually experienced peers in the network – pointing to the role of peer influence. Participants’ gender did not moderate these associations. Specific mechanisms underlying the observed associations and the role of peer selection remain important tasks for future research. 相似文献
2.
3.
4.
5.
目的 对比分析食管癌病例组与对照组血缘亲属食管癌患病风险,并了解食管癌家族中危险亲属人群患病的新线索.方法 采用病例对照研究方法 ,对食管癌病例组及对照组各720例进行逐层分析,以比较两组各血缘亲属父系、母系食管癌患病危险度(OR)的大小及差异.结果 (1)病例组Ⅰ级亲属食管癌患病危险度(1.34%~2.24%)显著高于对照组(0.78%~1.21%)(P<0.01);Ⅰ级亲属中病例组父母亲食管癌患病危险度为6.11%,显著高于对照组父母亲食管癌患病危险度2.97%(P<0O01).(2)以血缘亲属中父系和母系亲属逐层分析可见,病例组父系食管癌患病危险度(0.87%~1.01%)与母系患病危险度(0.50%~0.79%)均显著高于对照组父系食管癌患病危险度(0.53%~0.65%)与母系患病危险度(0.38%~0.47%)(P<0.05).进一步分析显示,病例组父系中男性亲属与母系中女性亲属,即父系中祖父、父亲、叔伯食管癌患病危险度为2.68%与母系中外祖母、母亲、姨的食管癌患病危险度1.91%均显著高于对照组父系中男性亲属食管癌患病危险度1.50%与母系中女性亲属食管癌患病危险度0.92%(P<0.01).结论 山西省食管癌患者血缘亲属发病危险主要是父亲及其兄弟、母亲及其姐妹,其下代患食管癌风险要大. 相似文献
6.
7.
8.
The temporal bones from fetuses with known autosomal trisomy syndromes were examined histopathologically after spontaneous or induced abortions. Fetal ages dated from the 17th to the 24th week of pregnancy. In all, 17 temporal bones from nine fetuses were studied and included seven cases of Down's syndrome and two of Edwards' syndrome. Temporal bones from fetuses with Down's syndrome had more abnormalities of the external and middle ears than of the inner ear. The bones from the fetuses with Edwards' syndrome showed abnormalities of the external or middle ear and retarded development of the inner ear (failed ossification of the otic capsule and unformed organ of Corti). 相似文献
9.
Mirna SuČIĆ Dubravka Boban Mirjana MarkoviĆ-glamoČak Mladen PetroveČki Matko MaruŠIĆ Boris Labar 《Medical oncology (Northwood, London, England)》1992,9(1):41-45
Cytochemical analysis of leukemic blasts from 46 patients with acute myeloblastic M2 leukemia (according to the FAB classification)
was performed before and after cytostatic therapy, and compared with findings obtained in 20 age- and sex-matched control
subjects. Cytochemical findings for myeloperoxidase (MPO), Sudan black B, acid phosphatase and alpha-naphthyl-acetate esterase
(ANAE) were related to the achievement of the first complete remission (CR),i.e. data were compared after the patients had been divided into CR and non-CR groups. The analysis clearly showed that a high
proportion of myeloperoxidase- and, to a lesser extent, Sudan black B-positive blasts before treatment may have constituted
a significantly unfavourable prognostic factor. 相似文献
10.
Eva Dragomirecka William R. Lenderking Lucie Motlova Eva Goppoldova Pavla Šelepova 《Quality of life research》2006,15(2):307-312
The Schwartz Outcomes Scale-10 (SOS-10) is a 10-item scale developed to measure the effectiveness of psychiatric treatments.
Using standard methodology, we translated the scale into Czech and examined the psychometric properties of the Czech version.
207 in-patients admitted to Prague Psychiatric Center were included in the study. All patients completed the SOS at admission
and discharge. The SOS-10 scale was also administered to 170 persons from the general population. Reliability, validity and
sensitivity to treatment change of the Czech SOS-10 were analyzed. The Cronbach’s α coefficient was 0.92. The item-total correlation coefficients varied from 0.56 to 0.82. The SOS-10 correlated well with condition-specific
measures including depression (BDI) and anxiety (BAI) and a global self-rated symptom severity scale (CGI). The SOS-10 also
had significant correlations with the Health, Basic needs, Relationship, and Leisure time domains of the Czech version of
the Subjective Quality of Life Analysis (SQUALA-CZ). The scale discriminated well between patients and controls, with patients
scoring significantly lower on all SOS items. The patient sample’s admission and discharge scores were significantly different,
indicating that the scale is sensitive to treatment changes. We concluded that the Czech SOS-10 is valid with reliability
and factor structure similar to the American language version. 相似文献