全文获取类型
收费全文 | 18839篇 |
免费 | 1332篇 |
国内免费 | 567篇 |
专业分类
耳鼻咽喉 | 163篇 |
儿科学 | 479篇 |
妇产科学 | 327篇 |
基础医学 | 2685篇 |
口腔科学 | 1608篇 |
临床医学 | 1542篇 |
内科学 | 3018篇 |
皮肤病学 | 281篇 |
神经病学 | 878篇 |
特种医学 | 759篇 |
外科学 | 1289篇 |
综合类 | 1878篇 |
现状与发展 | 3篇 |
预防医学 | 953篇 |
眼科学 | 1881篇 |
药学 | 1682篇 |
5篇 | |
中国医学 | 782篇 |
肿瘤学 | 525篇 |
出版年
2024年 | 54篇 |
2023年 | 345篇 |
2022年 | 839篇 |
2021年 | 1110篇 |
2020年 | 779篇 |
2019年 | 679篇 |
2018年 | 678篇 |
2017年 | 589篇 |
2016年 | 648篇 |
2015年 | 660篇 |
2014年 | 1123篇 |
2013年 | 1366篇 |
2012年 | 889篇 |
2011年 | 996篇 |
2010年 | 790篇 |
2009年 | 768篇 |
2008年 | 742篇 |
2007年 | 745篇 |
2006年 | 651篇 |
2005年 | 612篇 |
2004年 | 510篇 |
2003年 | 485篇 |
2002年 | 464篇 |
2001年 | 416篇 |
2000年 | 310篇 |
1999年 | 269篇 |
1998年 | 271篇 |
1997年 | 261篇 |
1996年 | 217篇 |
1995年 | 187篇 |
1994年 | 195篇 |
1993年 | 181篇 |
1992年 | 192篇 |
1991年 | 167篇 |
1990年 | 141篇 |
1989年 | 133篇 |
1988年 | 140篇 |
1987年 | 128篇 |
1986年 | 135篇 |
1985年 | 170篇 |
1984年 | 124篇 |
1983年 | 85篇 |
1982年 | 122篇 |
1981年 | 91篇 |
1980年 | 82篇 |
1979年 | 52篇 |
1978年 | 34篇 |
1977年 | 48篇 |
1976年 | 21篇 |
1975年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Esin Benli Küçük Ercan Kaydok Kürsad Ramazan Zor Gamze Yıldırım Biçer 《Topics in stroke rehabilitation》2020,27(8):630-635
ABSTRACT Objective: Dry eye is reported to be associated with several neurological diseases. The aim of this study is to evaluate the patients with hemiplegia after stroke for dry eye and compare their results with a control group. Materials and methods: Forty-five patients with hemiplegia and 45 individuals as the control group were included in the study. Tear function tests (Schirmer and tear breakup time) and a dry eye questionnaire for dry eye symptoms (ocular surface disease index) were performed and the results of the two groups were compared. Results: Schirmer test results were significantly lower in the post-stroke hemiplegia group compared to the control group (11.3 ± 8.2 mm and 20.6 ± 11.6 mm, respectively, p < .001). Tear breakup time results were significantly lower in the post-stroke hemiplegia group compared to the control group (7.9 ± 3.1 s and 12.1 ± 4.3 s, respectively, p < .001). Ocular surface disease index scores were not significantly different between hemiplegia and control groups (21.6 ± 20.0 and 19.8 ± 13.9, respectively, p = .635). Schirmer scores lower than 10 mm (60% and 30%, p < .001) and tear breakup time results lower than 10 s (65.6% and 28.9%, p < .001) were also higher in the hemiplegia group compared to control group. Conclusion: We found lower Schirmer test and tear breakup time results and similar OSDI scores in hemiplegia patients compared to controls. Hemiplegia patients may have dry eye without typical symptoms. This should be taken into consideration in the follow-up and rehabilitation of post-stroke hemiplegia patients. 相似文献
4.
5.
应用拷贝数变异测序(copy number variation sequencing,CNV-seq)技术鉴别来源不明的胎儿标记染色体,明确其遗传物质的来源,并探讨此技术在产前诊断中的应用价值。讨论Pallister-Killian综合征(Pallister-Killian syndrome,PKS)的临床特征及遗传学特点,提高对此类罕见染色体疾病的认识。该病例因在妊娠中期超声发现胎儿异常而行羊水穿刺进行CNV-Seq检测,同时分析胎儿和父母的核型。羊水CNV-Seq结果示该样本12号染色体p13.33-p11.1处检测到拷贝数为3.5、片段大小为34.70 Mb的嵌合重复区域;羊水染色体核型结果为47,XY,+i(12)(p10)[58]/46,XX[42],综合上述结果考虑为PKS。通过结合超声结果,综合应用染色体G显带核型分析和CNV-seq技术能准确确认染色体异常片段来源,在产前有效诊断PKS患者。 相似文献
6.
7.
8.
《The ocular surface》2020,18(1):108-113
PurposeAromatase inhibitors (AIs) limit the synthesis of oestrogen in peripheral tissues thus lowering levels of oestrogen. The primary aim was to evaluate whether women treated with AIs have altered dry eye symptoms and signs. A sub-aim was to investigate whether symptoms of dry eye in postmenopausal women were associated with symptoms of non-eye pain, ocular pain and self-rated pain perception.MethodsThis cross-sectional, observational, single visit study recruited 56 postmenopausal women (mean age 64.1 + 7.9 years) and 52 undergoing AI treatment (mean age 66.6 + 9.0). Ocular symptoms (OSDI, MGD14) and pain questionnaires (PSQ, OPAS) were administered and signs of dry eye and meibomian gland dysfunction were evaluated.ResultsAlmost half of each group reported dry eye symptoms, defined as OSDI>12 (48% control, 46% AI). The PSQ score was significantly higher in the AI group (p = 0.04). Neither frequency or severity of dry eye (or MGD) symptoms scores were significantly different between groups. In the AI group, meibomian gland expressibility score was worse (p = 0.003); there were no differences in any other signs. Higher OSDI scores were associated with higher OPAS eye-pain scores (r = 0.49, p < 0.001), but not OPAS non-eye pain (r = 0.09, p = 0.35). Pain perception (PSQ) showed a moderate positive association with OPAS eye-pain (r = 0.30, p = 0.003).ConclusionsIn this study elevated ocular symptoms were observed in both the AI treated and the untreated groups, with no difference between the groups. Women undergoing AI treatment for early stage breast cancer had worse meibum expressibility score and increased pain perception compared to an untreated group of women. 相似文献
9.
10.