全文获取类型
收费全文 | 21251篇 |
免费 | 2409篇 |
国内免费 | 1529篇 |
专业分类
耳鼻咽喉 | 177篇 |
儿科学 | 261篇 |
妇产科学 | 193篇 |
基础医学 | 2387篇 |
口腔科学 | 392篇 |
临床医学 | 2673篇 |
内科学 | 3139篇 |
皮肤病学 | 180篇 |
神经病学 | 1118篇 |
特种医学 | 696篇 |
外国民族医学 | 7篇 |
外科学 | 1910篇 |
综合类 | 4087篇 |
现状与发展 | 2篇 |
预防医学 | 1521篇 |
眼科学 | 624篇 |
药学 | 2538篇 |
32篇 | |
中国医学 | 1494篇 |
肿瘤学 | 1758篇 |
出版年
2024年 | 115篇 |
2023年 | 414篇 |
2022年 | 1014篇 |
2021年 | 1275篇 |
2020年 | 1010篇 |
2019年 | 791篇 |
2018年 | 819篇 |
2017年 | 728篇 |
2016年 | 690篇 |
2015年 | 1057篇 |
2014年 | 1241篇 |
2013年 | 1194篇 |
2012年 | 1719篇 |
2011年 | 1809篇 |
2010年 | 1171篇 |
2009年 | 948篇 |
2008年 | 1278篇 |
2007年 | 1096篇 |
2006年 | 988篇 |
2005年 | 1031篇 |
2004年 | 639篇 |
2003年 | 664篇 |
2002年 | 552篇 |
2001年 | 421篇 |
2000年 | 418篇 |
1999年 | 361篇 |
1998年 | 255篇 |
1997年 | 235篇 |
1996年 | 192篇 |
1995年 | 155篇 |
1994年 | 133篇 |
1993年 | 87篇 |
1992年 | 99篇 |
1991年 | 110篇 |
1990年 | 112篇 |
1989年 | 83篇 |
1988年 | 77篇 |
1987年 | 67篇 |
1986年 | 44篇 |
1985年 | 41篇 |
1984年 | 14篇 |
1983年 | 11篇 |
1982年 | 14篇 |
1981年 | 4篇 |
1980年 | 2篇 |
1979年 | 5篇 |
1968年 | 1篇 |
1965年 | 1篇 |
1964年 | 1篇 |
1936年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Jiang Guoxiang Zhang Ruihua Yang Xuan Zhang Wen Hou Yubin 《Clinical and experimental medicine》2022,22(2):193-200
Clinical and Experimental Medicine - Colon cancer is one of most common cancers. The progression of various cancers is driven by miRNA-570. The role of miRNA-570 in the progression of colon cancer... 相似文献
2.
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
3.
目的:通过布局网络版色谱工作站,实现色谱系统电子实验数据合规化,提升实验室色谱电子数据的安全性,提高实验室色谱系统管理的效率。方法:布局线上网络版色谱工作站。结果:工作站运行良好,升级数据安全,法规响应更完善,节省了实验室管理及维护成本。结论:值得在有色谱需求的实验室推广。 相似文献
4.
5.
Yulong Lian Jing Xiao Chen Zhang Suzhen Guan Fuye Li Hua Ge 《Archives of environmental & occupational health》2016,71(2):74-84
The present study compared the level of occupational strain and work ability among Han, Hui, Uygur, Hui, and Kazakh teachers, and explored ethnic differences based on the associations of psychosocial factors at work, occupational strain, and work ability. A cross-sectional survey was conducted among 2,941 teachers in primary and secondary schools in Xinjiang Province, China. Psychosocial factors, occupational strain, and work ability were measured using the Occupation Stress Inventory—Revised Edition (OSI-R) and Work Ability Index. Han and Hui teachers experienced reduced work ability compared with Uygur and Kazakh teachers, and this finding was caused, in part, by exposure to psychosocial factors at work. The vocational and psychological strains caused by these factors play an important role in reduced work ability among all ethnic teacher groups. The findings indicate the importance of taking action to reduce occupational strain for promoting teachers' work ability in multiethnic workplaces. 相似文献
6.
7.
Platelet function has been described by many laboratory assays, and PL-11 is a new point-of-care platelet function analyzer based on platelet count drop method, which counts platelet before and after the addition of agonists in the citrated whole blood samples. The present study sought to compare PL-11 with other three major more established assays, light transmission aggregometry (LTA), VerifyNow? aspirin system and thromboelastography (TEG), for monitoring the short-term aspirin responses in healthy individuals. Ten healthy young men took 100?mg/d aspirin for 3-day treatment. Platelet function was measured via PL-11, LTA, VerifyNow and TEG, respectively. The blood samples were collected at baseline, 2 hour, 1 day during the aspirin treatment and 1 day, 5?±?1 days, 8?±?1 days after the aspirin withdrawal. Moreover, 90 additional healthy subjects were recruited to establish a reference range for PL-11. Platelet function of healthy subjects decreased significantly 2 hours after 100?mg/d aspirin intake and began to recover during 4–6 days after the aspirin withdrawal. Correlations between methods were PL-11 vs. LTA (r?=?0.614, p?<?0.01); PL-11 vs. VerifyNow (r?=?0.829, p?<?0.01); PL-11 vs. TEG (r?=?0.697, p?<?0.001). There was no significant bias between PL-11 and LTA at baseline (bias?=?1.94%, p?=?0.804) using Bland-Altman analysis, while the data of PL-11 were significantly higher than LTA (bias?=?24.02%, p?<?0.001) during the aspirin therapy. The reference range for PL-11 in healthy young individuals was from 66.8 to 90.5% (95%CI). When aspirin low-responsiveness was defined as LTA?>?20%, the cut-off values for each method were, respectively: PL-11?>?50%, VerifyNow?>?533 ARU, TEG?>?60.2%. The results of different platelet function assays were uninterchangeable for monitoring aspirin response and correlations among them were also varied. Correlations among PL-11 and other three major assays suggested the ability of PL-11 to assess the treatment effects of aspirin. But a large cohort study is needed to confirm the cut-off value of aspirin response detected by PL-11. 相似文献
8.
9.
10.