全文获取类型
收费全文 | 41851篇 |
免费 | 4476篇 |
国内免费 | 1717篇 |
专业分类
耳鼻咽喉 | 124篇 |
儿科学 | 167篇 |
妇产科学 | 210篇 |
基础医学 | 2404篇 |
口腔科学 | 766篇 |
临床医学 | 4059篇 |
内科学 | 1953篇 |
皮肤病学 | 286篇 |
神经病学 | 801篇 |
特种医学 | 807篇 |
外国民族医学 | 2篇 |
外科学 | 2070篇 |
综合类 | 9990篇 |
现状与发展 | 3篇 |
预防医学 | 3877篇 |
眼科学 | 306篇 |
药学 | 7004篇 |
186篇 | |
中国医学 | 12474篇 |
肿瘤学 | 555篇 |
出版年
2024年 | 177篇 |
2023年 | 613篇 |
2022年 | 1443篇 |
2021年 | 2186篇 |
2020年 | 2010篇 |
2019年 | 1051篇 |
2018年 | 997篇 |
2017年 | 1643篇 |
2016年 | 1765篇 |
2015年 | 1623篇 |
2014年 | 3721篇 |
2013年 | 3163篇 |
2012年 | 3572篇 |
2011年 | 3487篇 |
2010年 | 2587篇 |
2009年 | 1955篇 |
2008年 | 1954篇 |
2007年 | 2129篇 |
2006年 | 1621篇 |
2005年 | 1419篇 |
2004年 | 1130篇 |
2003年 | 904篇 |
2002年 | 823篇 |
2001年 | 738篇 |
2000年 | 635篇 |
1999年 | 559篇 |
1998年 | 482篇 |
1997年 | 381篇 |
1996年 | 344篇 |
1995年 | 350篇 |
1994年 | 315篇 |
1993年 | 303篇 |
1992年 | 253篇 |
1991年 | 231篇 |
1990年 | 199篇 |
1989年 | 186篇 |
1988年 | 178篇 |
1987年 | 153篇 |
1986年 | 143篇 |
1985年 | 153篇 |
1984年 | 89篇 |
1983年 | 54篇 |
1982年 | 93篇 |
1981年 | 44篇 |
1980年 | 35篇 |
1979年 | 30篇 |
1978年 | 29篇 |
1977年 | 20篇 |
1976年 | 24篇 |
1974年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
In vivo absolute quantification for mouse muscle metabolites using an inductively coupled synthetic signal injection method and newly developed 1H/31P dual tuned probe 下载免费PDF全文
992.
目的观察加味生化汤预防血瘀型产妇产后恶露不绝对血液流变学的影响。方法将经阴道分娩的血瘀型产妇120例,完全随机分为观察组、对照组、空白组,每组各40例。观察组服用自拟加味生化汤,对照组予缩宫素10 U肌内注射,空白组服用安慰剂(多维元素胶囊)。观察3组患者中医证候的改变,产后恶露不绝的发生率以及治疗前后血液流变学指标的变化。结果观察组中医证候的总有效率为95.0%,对照组、空白组分别为75.0%、82.5%,观察组与其余两组比较,差异有统计学意义(P〈0.05),对照组与空白组比较,差异无统计学意义(P〉0.05);观察组、对照组、空白组产后恶露不绝的发生率分别为15.0%、32.5%、35.0%,观察组产后恶露不绝的发生率明显低于对照组、空白组(P〈0.05),对照组与空白组比较,差异无统计学意义(P〉0.05);观察组血液流变学各项指标与治疗前比较明显改善(P〈0.05),与其余两组比较,差异有统计学意义(P〈0.05)。结论加味生化汤能有效预防血瘀型产妇产后恶露不绝的发生,能明显改善其血液流变学各项指标,值得临床推广。 相似文献
993.
994.
《International journal of speech-language pathology》2013,15(3):189-196
Evidence-based practice (EBP) is a well established concept in the field of speech-language pathology. However, evidence from research may not be the primary information that practitioners use to guide their treatment selection from the many potential options. There are various alternative therapy procedures that are strongly promoted, so clinicians must become skilled at identifying pseudoscience from science in order to determine if a treatment is legitimate or actually quackery. In order to advance the use of EBP, clinicians can gather practice-based evidence (PBE) by using the scientific method. By adhering to the principles of science, speech-language pathologists can incorporate science-based practice (SBP) into all aspects of their clinical work. 相似文献
995.
H. O. Fadnes 《Scandinavian journal of clinical and laboratory investigation》2013,73(5):441-446
Protein concentration and hydrostatic pressure were measured in subcutaneous tissue of rats during development of aminonucleoside nephrosis. Samples of interstitial fluid for protein analysis were collected from subcutaneous tissue by a wick method, and hydrostatic pressure was measured by a modified Scholander technique. When the serum protein concentration was reduced from 6.1 to 4.8 g/100 ml, interstitial fluid protein concentration fell from 3.0 to 1.1 g/100 ml. This corresponds to a reduction of calculated oncotic pressures from 18.0 to 13.0 mm Hg and from 7.8 to 3.0 mm Hg in serum and interstitial fluid, respectively, thus leaving a nearly constant net transcapillary oncotic pressure. When serum protein concentration was further reduced to 3.8 g/100 ml, interstitial fluid protein concentration was reduced to 0.5 g/100 ml, reducing net transcapillary oncotic pressure by 2–3 mm Hg. The average hydrostatic pressure in subcutis was 1.0 mm Hg sub-atmospheric under control conditions and did not change during hypoproteinemia. The results indicate that a reduction of interstitial protein concentration is an important factor in preventing edema formation in hypoproteinemia. 相似文献
996.
目的:探讨中风后发生顽固性呃逆的特点及治疗。方法:通过对32例患者的临床症状及治疗情况进行总结。结果:32例患者中第1天治愈未复发者11例,好转者15例,占81.25%。治疗一周后评价治愈者26例,好转4例,无效2例,总有效率93.75%。结论:中风后发生顽固性呃逆患者,及时采用穴位贴敷、"止呃降逆汤"等联合治疗,能够得到很好地控制,并防止对中风病情的加重。 相似文献
997.
鼻内镜下揭盖法治疗鼻前庭囊肿24例临床观察 总被引:1,自引:0,他引:1
目的观察鼻内镜下揭盖术治疗鼻前庭囊肿的临床效果。方法在鼻内镜下对24例患者行鼻前庭囊肿揭盖术,观察其治疗效果和并发症情况。结果24例均获治愈。无并发症,随访半年以上,均未见囊肿复发和并发症。结论鼻内镜下揭盖术治疗鼻前庭囊肿具有手术精确、创伤小、愈合快、并发症少等优点,值得临床推广应用。 相似文献
998.
《Journal of interprofessional care》2013,27(2):85-91
Phenomenological evidence describing life history patterns frequently occurring in cancer patients, typically involving bereavement or other separation, may be explicable in terms of behavioural conditioning. Emotional loss has been demonstrated to produce biochemical changes which have an adverse effect on immune function. The emotional loss may become a conditioned stimulus so that further loss will produce immunosuppression, possibly greater than in the first instance, as a result of a process of sensitization. The model proposes a number of testable hypotheses, and implies that behavioural and psychological techniques could become important factors in promoting an environment conducive to healthy immune function. 相似文献
999.
糖尿病目前已被国际社会列为人类健康头号杀手的非传染性疾病。血糖的检测在糖尿病的诊断、治疗及预防急性和慢性并发症中尤为重要。糖化血红蛋白(glycatedhemoglobin Alc,HbAlc)是反映既往2~3个月平均血糖水平的指标,用于评估长期血糖控制状况。目前HbAlc检测已经被推荐作为糖尿病诊断试验。现对HbAlC的检测方法及其临床意义作一综述。 相似文献
1000.