全文获取类型
收费全文 | 1483507篇 |
免费 | 106283篇 |
国内免费 | 24428篇 |
专业分类
耳鼻咽喉 | 19097篇 |
儿科学 | 38064篇 |
妇产科学 | 37858篇 |
基础医学 | 203238篇 |
口腔科学 | 39214篇 |
临床医学 | 137900篇 |
内科学 | 286962篇 |
皮肤病学 | 28606篇 |
神经病学 | 109456篇 |
特种医学 | 57799篇 |
外国民族医学 | 609篇 |
外科学 | 219300篇 |
综合类 | 70395篇 |
现状与发展 | 75篇 |
一般理论 | 333篇 |
预防医学 | 95084篇 |
眼科学 | 36471篇 |
药学 | 118246篇 |
300篇 | |
中国医学 | 19109篇 |
肿瘤学 | 96102篇 |
出版年
2022年 | 14485篇 |
2021年 | 21887篇 |
2020年 | 15579篇 |
2019年 | 17651篇 |
2018年 | 22103篇 |
2017年 | 18226篇 |
2016年 | 18387篇 |
2015年 | 23894篇 |
2014年 | 31666篇 |
2013年 | 37526篇 |
2012年 | 52148篇 |
2011年 | 56651篇 |
2010年 | 34475篇 |
2009年 | 30467篇 |
2008年 | 46949篇 |
2007年 | 49171篇 |
2006年 | 49729篇 |
2005年 | 48816篇 |
2004年 | 41745篇 |
2003年 | 40123篇 |
2002年 | 38211篇 |
2001年 | 70592篇 |
2000年 | 73185篇 |
1999年 | 63314篇 |
1998年 | 18952篇 |
1997年 | 17373篇 |
1996年 | 16007篇 |
1995年 | 14877篇 |
1994年 | 13632篇 |
1993年 | 11929篇 |
1992年 | 44248篇 |
1991年 | 41671篇 |
1990年 | 40273篇 |
1989年 | 38861篇 |
1988年 | 35651篇 |
1987年 | 34608篇 |
1986年 | 32691篇 |
1985年 | 30816篇 |
1984年 | 22239篇 |
1983年 | 18638篇 |
1982年 | 10575篇 |
1979年 | 19667篇 |
1978年 | 13264篇 |
1977年 | 11363篇 |
1975年 | 11399篇 |
1974年 | 13524篇 |
1973年 | 12841篇 |
1972年 | 12268篇 |
1971年 | 11515篇 |
1970年 | 10925篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
医科院校学生心理危机管理浅探 总被引:2,自引:0,他引:2
结合医科院校学生心理危机管理的实践,阐述大学生心理危机的内涵、类型、特征及心理危机管理的特性,并从建立预警系统、增设心理委员、危机处理的专业化及危机干预策略等方面探讨在医科院校加强学生心理危机管理的对策。 相似文献
72.
Roger F Uren 《Journal of nuclear medicine》2006,47(2):191-195
73.
74.
75.
目的治疗顽固性下颌磨牙根尖周炎。并尽量减少对牙周膜的机械性损伤。方法采用下牙槽神经阻滞麻醉,并配合局部麻醉。拔牙钳的尖置放于釉牙骨质界以上,采用颊舌向摆动的方式将患牙拔下。在不断滴有生理盐水的条件下,立即用高速车针磨除患牙根尖2 ̄3mm的牙体组织,根管内3 ̄5mm深的充填物要用圆钻将其清除,再用牙胶尖和氢氧化钙糊剂充填。将患牙再植入牙槽窝之前,务必用生理盐水将牙槽窝冲洗干净,要求严格控制在15分钟内完成再植,并尽量减少对牙周膜的机械性损伤。再植牙齿一般不需要夹板固定,必要时可采用缝线缝合固定。结果我们选择的5例患者,术后随访1 ̄2年,1例患者再植失败,4例患者再植成功。结论特异性再植术治疗顽固性下颌磨牙根尖周炎疗效理想,而且较易掌握。 相似文献
76.
77.
S F Wong A Lee-Tannock D Amaraddio F Y Chan H D McIntyre 《Ultrasound in obstetrics & gynecology》2006,28(7):934-938
OBJECTIVE: To assess the effect of glucose control on the rate of growth of fetuses in women with pregestational diabetes mellitus (Types 1 and 2). METHODS: All pregestational diabetic women booked at Mater Mothers' Hospital, Brisbane, Australia, between 1 January 1994 and 31 December 2002, were included. Pregnancies with congenital fetal anomalies, multiple pregnancies, and pregnancies terminated prior to 20 weeks' gestation were excluded. Dating scans were performed before 14 weeks' gestation and serial scans were performed at 18, 24, 28, 32 and 36 weeks. Fetal parameters, including biparietal diameter, femur length and abdominal circumference, were recorded. The daily growth rates for biparietal diameter, femur length, and fetal abdominal area were calculated and compared with those in a low-risk (non-diabetic) population. The growth rates in fetuses of women with satisfactory diabetic control (HbA1c < 6.5%) and unsatisfactory control (HbA1c > or = 6.5%) in the three trimesters were compared. RESULTS: A total of 174 diabetic pregnancies were included and a total of 997 ultrasound scans were performed. The growth rates for fetuses of mothers with diabetes mellitus were significantly higher than for those in the low-risk population. The z-scores for biparietal diameter, femur length, and fetal abdominal area were 0.18, 0.59 and 1.44, respectively. Fetuses of diabetic mothers with high HbA1c in the first trimester had significantly greater fetal abdominal area growth rate than those with normal HbA1c (fetal abdominal area z-score of 1.7 vs. 0.75, P = 0.009). Although the fetal abdominal area z-scores in fetuses of diabetic mothers with high HbA1c in the second or third trimesters were also higher than those with normal HbA1c levels, the differences did not reach statistical significance. Maternal obesity did not influence the fetal growth rate. CONCLUSION: The rate of growth of fetuses of diabetic mothers differs from that of the normal population. Growth acceleration persists until the late third trimester. Moreover, periconceptional glucose control appears to have a significant effect on accelerated growth of the fetal abdominal area. 相似文献
78.
79.
80.
D F du Toit 《SADJ》2003,58(9):375-6, 380-3
The tongue (L. lingua; G. glossa) functions as a digestive organ by facilitating the movement of food during mastication and assisting swallowing. Other important functions include speech and taste. The tongue consists of striated muscle and occupies the floor of the mouth. The dorsal mucosal surface consists of stratified squamous epithelium, with numerous papillae and taste buds. The tongue, a voluntary muscular structure, is attached by a fold, called the frenulum, to the floor of the mouth. Typically, between 8 and 12 circumvallate papillae are arranged in an inverted V-shape towards the base of the tongue. This anatomical review focuses on structure, function relationships and diseases affecting the tongue. From a primary oral health care perspective, this overview will facilitate the process of differential diagnosis in persons presenting with vesiculo-bullous, ulcerative, atrophic and cystic disorders of the tongue. Suspicious lesions should be biopsied to rule out carcinoma. 相似文献