全文获取类型
收费全文 | 1333篇 |
免费 | 75篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 32篇 |
儿科学 | 59篇 |
妇产科学 | 59篇 |
基础医学 | 150篇 |
口腔科学 | 76篇 |
临床医学 | 112篇 |
内科学 | 220篇 |
皮肤病学 | 36篇 |
神经病学 | 78篇 |
特种医学 | 61篇 |
外科学 | 234篇 |
综合类 | 23篇 |
一般理论 | 1篇 |
预防医学 | 33篇 |
眼科学 | 87篇 |
药学 | 74篇 |
中国医学 | 7篇 |
肿瘤学 | 70篇 |
出版年
2023年 | 18篇 |
2022年 | 25篇 |
2021年 | 58篇 |
2020年 | 31篇 |
2019年 | 37篇 |
2018年 | 40篇 |
2017年 | 31篇 |
2016年 | 51篇 |
2015年 | 57篇 |
2014年 | 39篇 |
2013年 | 63篇 |
2012年 | 94篇 |
2011年 | 93篇 |
2010年 | 73篇 |
2009年 | 61篇 |
2008年 | 101篇 |
2007年 | 83篇 |
2006年 | 80篇 |
2005年 | 79篇 |
2004年 | 69篇 |
2003年 | 52篇 |
2002年 | 49篇 |
2001年 | 21篇 |
2000年 | 14篇 |
1999年 | 12篇 |
1998年 | 4篇 |
1997年 | 8篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 1篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 7篇 |
1989年 | 5篇 |
1988年 | 9篇 |
1987年 | 11篇 |
1986年 | 6篇 |
1985年 | 1篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1968年 | 2篇 |
排序方式: 共有1412条查询结果,搜索用时 15 毫秒
991.
Güzin Iskeleli Hrisi Bahar Mustafa Unal Ozgur Artunay Nilufer Akova Muzeyyen Mamal Torun 《The CLAO journal》2002,28(4):192-195
PURPOSE: This article reports a microbiologic study of two kinds of monthly frequent-replacement daily wear soft contact lenses, with different amounts of water content, in asymptomatic contact lens wearers. METHOD: We studied 35 lenses of 18 patients who wear frequent-replacement soft contact lenses with a water content of 38% and 40 lenses of 20 patients using frequent-replacement contact lenses with a water content of 55%. The lenses worn by patients regularly for 1 month were removed from their eyes in a sterile manner on the 30th day and were studied microbiologically to isolate pathogenic agents. RESULTS: In the group of monthly frequent-replacement soft contact lenses with a water content of 38%, microorganisms were isolated at a rate of 91%; and in the group of monthly frequent-replacement soft contact lenses with a water content of 55%, microorganisms were isolated at a rate of 85%. When the two groups were compared, there was no statistically significant difference (P=0.31). Although coagulase-negative staphylococci, Corynebacterium spp, and gram-negative rods were detected in both groups, Staphylococcus aureus, non-hemolytic streptococci, Neisseriae spp, and Penicillium spp also were isolated in the group with the higher water content. CONCLUSION: Bacteria spreading from the environment or from skin flora to the eyes showed more diversity in the group of frequent-replacement soft contact lenses with a high water content. Additionally, Penicillium spp also was isolated in this group. Therefore scrupulous attention to daily lens care is crucial for people who wear frequent-replacement soft contact lenses. 相似文献
992.
Benzion Joshua Gideon Bahar Jaqueline Sulkes Thomas Shpitzer Eyal Raveh 《Otolaryngology--head and neck surgery》2006,135(4):576-580
OBJECTIVE: To assess the long-term (3-5 years) success of adenoidectomy and reasons for unsatisfactory results. STUDY DESIGN AND SETTING: The parents of all children who underwent adenoidectomy alone at a major tertiary center from 1998 to 2000 were asked to complete a questionnaire assessing their child's well-being and symptomatology 3-5 years after surgery; some were invited for follow-up. Symptom improvement, persistent symptoms, and adenoid regrowth were evaluated. RESULTS: Among the 206 parents who complied, 74%-87% reported improvement in all main symptoms: nasal obstruction, snoring, chronic rhinorrhea, hyponasal speech, and obstructive sleep disorder. At follow-up (n = 36), the symptomatic patients had significantly more anatomic nasal abnormalities (P = 0.01) and a higher rate of significant adenoid enlargement (P = 0.08), 3 patients (19%) vs none (0%). CONCLUSIONS AND SIGNIFICANCE: Adenoidectomy alone is satisfactory treatment for nasal obstruction and obstructive sleep apnea in selected children. Though some adenoid regrowth is not rare, clinically significant adenoid regrowth is infrequent. Persistent or recurrent symptoms are attributable mainly to nasal pathology. 相似文献
993.
Histopathology of the spinal cord after intrathecal cocaine, bupivacaine, lignocaine and adrenaline in the rat 总被引:2,自引:0,他引:2
Repeated intrathecal injections were given through catheters which had been chronically implanted in the subarachnoid space of rats. Injections were made of cocaine 0.25%, 0.125% and 0.0625%; bupivacaine 0.5%; lignocaine 2% and 0.5%; adrenaline 0.01% (1 in 10 000) and 0.002% (1 in 200 000); and sodium chloride 0.9%. Five injections of 35 microliter of each concentration of each drug were given hourly each day for two days to three rats. No clinical nerve damage was detectable in any rat. The only pathological change found in any rat was the development of cytoplasmic vacuolation in the neurones of the anterior and posterior horns. The changes were most prominent after injection of 0.9% sodium chloride and bupivacaine, whilst lignocaine (0.5 and 2%) showed the least number of vacuoles, which were also the smallest in size. Adrenaline and cocaine were intermediate in effect. There was no evidence of cell death. These changes were not seen in control animals in which catheters had been implanted but no injections had been given. The changes were mild and it is concluded that the agents tested caused no significant damage. 相似文献
994.
995.
A 40-year-old man with known definite Behçet's disease (BD) was admitted with confusional state which had started 4 days before admission with an acute headache and vomiting. Neurological examination revealed confusion, stiff neck, right facial weakness, left hemiparesis, dysartria and truncal ataxia. CSF was haemorrhagic and xanthochromic. Cranial CT scans were negative, but MRI showed a right pontine hyperintense lesion on T2-weighted images. Bilateral carotid angiograms were normal. Right vertebral angiogram showed findings consistent with a dissection at the V2 segment of the artery. At the level of the fifth cervical vertebra, a radiculomedullary branch of the vertebral artery with an ancurysmal dilatation in its intradural portion was notable. This case shows that, in BD, aneurysn formation can also occur in a spinal artery and spontaneous vertebral artery dissection can be seen. 相似文献
996.
Salih Kavukcu Senol Coskun Necla Cevik Bahar Kuscu Atilla Akkoclu 《Indian journal of pediatrics》1993,60(2):249-255
Children who had undergone adenotonsillectomy for recurrent adenotonsillitis showing no signs of clinical or radiological
obstructive manifestations were evaluated with pulmonary function tests before, and one month after the operation. In relation
to the result obtained by function tests, 60% of 45 cases (27) had the findings of mild obstructive pulmonary disease whereby
these findings were in transient character that vanished after the operation. The following parameters were measured and found
that they were all increased, mean FVC from 82.22±6.82 to 93.11±7.81 (p<0.01), mean PEF from 77.60±8.38 to 88.60±5.57 (P<0.01),
mean FEVI from 74.28±11.68 to 90.15±7.28 (p<0.01), mean FEF 25 from 71.44±11.53 to 83.53±6.40 (p<0.01), mean FEF 50 from 69.53±14.53
to 84.37±7.72 (p<0.01), mean FEF 75 from 70.08±12.15 to 85.48±7.15 (p<0.01). In conclusion, pulmonary function tests could
reveal the obstructive effects of adenotonsillar hypertrophy with no clinical or radiological obstructive findings, and could
be useful in surgical indications of adenotonsillar hypertrophy dur to recurrent infections in children. 相似文献
997.
998.
999.
1000.